Friday, 23 April 2010
Why choose hard grads instead of soft ones?
People say you should only go for the hard grads when there's a distinct horizon otherwise you'll get a band of darkness across the image where the cutoff is - but at the TP convention last year the MD of Lee filters got us all to hold up a hard grad to our eyes to mimic what the lens would see, and you couldn't make out any visible banding. In othet words, the MD of Lee filters said "Fuck the soft grads, they're sh*t". That's good enough for me
Filters for landscapers
But standard fayre for landscapers would be (and I've just done the same thing on TP )
ND4
ND8
ND4 hard grad
ND8 hard grad
The nd4 and nd8 you can leave for now as you can replicate those effects by letting the sky get darker . The grads are essential though - they help get your skies darker while keeping your ground the same brightness - gets your exposure nicely balanced.
Get those in square format and you'll still be able to use them when your lenses get bigger. You basically need a holder (Cokin P type is the most common) and an adaptor for the same mm as your thread size.
Look on http://www.premierink.co.uk. They do a starter pack for around £45 which has some grads and a holder set.
Edit: http://www.premier-ink.co.uk/photographic/square-filters/p-t ype/kood-ptype-filter-kit-58mm-p-1250.html
Recommended Reading
Scott Kelbys “Digital Photography Book”
Tackles the most important side of digital photography - how to take pro-quality shots using the same tricks top digital pros use. This book shows which button to push, which setting to use, when to use them, and nearly two hundred photographic "tricks of the trade". Each page covers just one trick, one concept that makes your photography better.
Bryan Peterson’s “Understanding Exposure: How to Shoot Great Photographs with a Film or Digital Camera”
Provides detailed lessons on the elements of exposure and how each relates to depth of field, freezing and blurring action, and shooting in low light, demonstrating a diversity of creative choices in exposing a picture.
Michael Freeman’s “The Photographer's Eye: Composition and Design for Better Digital Photos”
The Photographers Eye shows how anyone can develop an eye for seeing great digital photos. The book explores all the traditional approaches to composition and design, but crucially, it also addresses the new digital technique of shooting in the knowledge that a picture will later be edited, manipulated, or montaged to result in a final image that may be very different from the one seen in the viewfinder.
Michael Freeman’s “Mastering HDR Photography: Combining Technology and Artistry to Create High Dynamic Range Images”
Mastering High Dynamic Range Photography explains how to shoot specifically for HDR and discusses, in detail, the software available to combine multiple exposures into a single HDR image. Perhaps most importantly, HDR is revealed as a technology not of soulless automation, but precisely because it breaks with familiar photographic conventions one that requires judgement and artistry on the part of the photographer.
Steven Biver’s “Light: Science and Magic: An Introduction to Photographic Lighting”
This is not your typical how-to book! This is a tried-and-true how to understand book. How to understand and predict the size of light, types of reflections, and the family of angles. Master these principles and you can shoot any portrait, any surface, anywhere!
Ross Hoddinott’s “The Digital Exposure Handbook”
Ross Hoddinott unravels the fundamentals of this fascinating subject and presents it in a clear and easy-to-understand way. This practical, jargon-free guide will be an essential companion out in the field, helping photographers turn theory into practice and to achieve creative control over their images.
Michael Freeman’s Perfect Exposure: The Professional Guide to Capturing Perfect Digital Photographs
Clear, direct and guaranteed, Perfect Exposure looks at the way professionals work, and lays out the decisions and sequences with absolute clarity, while incorporating the latest, powerful post-processing techniques. Choosing the exposure for a photograph is both alarmingly simple, and infinitely complex. Simple, because there is ultimately only one dosage of light, controlled as it always has been, by a shutter speed, aperture and ISO setting. But arriving at the perfect exposure is also complex, because it affects everything in the image and its effect on the viewer.
Martin Evening's “Adobe Photoshop CS4 for Photographers: A Professional Image Editor's Guide to the Creative use of Photoshop for the Macintosh and PC
Adobe Photoshop CS4 for Photographers begins with an overview of the Photoshop interface and the fundamentals of how to use Photoshop, followed by how to configure and optimize your computer's performance to run the program and then it dives straight into the essentials of Camera Raw image editing. The Sharpening chapter shows how to use the Camera Raw controls to obtain optimum capture sharpening and noise reduction and the Essentials chapter outlines how to work with all the basic image adjustment tools that are in the program.
Practical workshops show you how to master the essential techniques, such as colour correction, retouching techniques, toning a black and white image, creating composite images and so on.
Martin Evening’s “Adobe Photoshop CS4 for Photographers: The Ultimate Workshop”
The authors describe in detail how to carry out some of their favourite Photoshop image editing and retouching techniques using examples taken from real-life professional shoots. The techniques described here don't just show you clever things you can do in Photoshop, they show how you can use Photoshop in a professional context, meeting the demands of art directors and fulfilling tricky briefs.
Collins’ “Complete Photography Manual”
Everything you need to know about photography, both digital and film, written by a team of experts. This comprehensive and superbly illustrated guide covers all aspects from basic composition to the latest digital know-how and digital darkroom techniques. Practical, inspiring and informative, Collins Complete Photography Manual takes you from choosing the right camera and understanding what different lenses can achieve, to creating the best possible composition. In addition, key techniques, such as image manipulation, are illustrated with stunning images and accompanied by easy-to-follow jargon-free text. There are separate sections on different themes, such as landscapes and nature, still life and sports shots, architecture, weddings, animals, and how to take a good portrait. In addition, professional tips throughout help you to avoid potential problems and show you how to get the best out of your camera and raise your level of photography.
Joe McNally’s “Hot Shoe Diaries”
In The Hot Shoe Diaries, Joe brings you behind the scenes to candidly share his lighting solutions for a ton of great images. Using Nikon Speedlights, Joe lets you in on his uncensored thought process—often funny, sometimes serious, always fascinating—to demonstrate how he makes his pictures with these small flashes. Whether he’s photographing a gymnast on the Great Wall, an alligator in a swamp, or a fire truck careening through Times Square, Joe uses these flashes to create great light that makes his pictures sing.
Julie Oswin’s “Contemporary Wedding Photography”
This user-friendly manual reveals the techniques needed to produce this contemporary style of wedding album, for professional photographers looking to update their methods, or for aspiring photographers wanting to break into this lucrative market. It includes all the advice you need, from preparation and planning before the wedding, to digital manipulation of your images and presentation to the couple after the event. It features comprehensive checklists, professional tips, tried-and-tested templates, advice boxes and step-by-step sequences to provide endless inspiration and guarantee successful shooting.
Thursday, 22 April 2010
Cheat Sheets
Basic Guide
Neutral Density Filter Guide
Photoshop Shortcuts
General helpful shizzle
Definitely shoot in RAW if you have a big enough memory card - gives you power to process your own photographs and has much more scope for cropping/post process work.
Use a UV filter on your lens most of the time where possible - it costs £10 to replace as opposed to hundreds/thousands if you need a new lens.
Follow the Rule of 3rds! There is a section on it in a previous post on this blog below.
Hosting your photos on a website like http://www.flickr.com/ will allow you to share and catalogue your photos for free (or if you decide to go pro, at a small cost) - you can join groups which will boost your confidence when nice people say nice things about your photos, and you can see stats like how many people have looked at your photos, where they are being posted by others etc. It does make an OK backup source for your photos, but use something else like an external harddrive as well in case your house burns down - although your photo collection might be the last thing on your mind if your house burns down.
Canons- The less numbers in the name, the better the camera.
Nikons- The more numbers in the name, the better (except the D3/D3x - best camera in the world, up yours cannon)
If you're shooting moving objects/panning - TURN OFF VR OR WHATEVER YOUR VIBRATION REDUCTION TECHNOLOGY IS! Also, same goes for it you are shooting on a tripod, the tripod is your VR, turning VR on will actually introduce shake, much the same as if you start taking anti-psychotic drugs when you're not mental will make you hallucinate. Sort of.
If you have an onboard flash indoors at a party for example (not a big group or if the subject is far away), and no flashgun/strobe - then try putting a bit of tissue paper over the front of it. You'll look like a bit of a mentalist, but it will soften'diffuse the light a little and will look better in the end (unless you are after hard light in which case don't bother)
Photoshop CS4 - Help and tutorials
rodney trotter - big up yourself:
In its simplest form it's a new text layer in photoshop, text white, slight
drop shadow with opacity anywhere between 20-50% (depending on the photo).I've
made the text layer into a gif (transparent background) and set up a custom
action so when I hit CTRL-F12 it loads it up, copies it, switches to the
previous tab, pastes it and sets opacity - saves the repetitiveness.If you
follow that then coolin a bit more depth: http://www.photoshopsupport.com/photoshop-blog/09/cs4-03/create-action-watermark-images-photoshop.html
Some great and helpful tutorials:
http://www.layersmagazine.com/category/tutorials/
http://www.planetphotoshop.com/category/tutorials/
http://www.photoshopcafe.com/tutorials.htm
http://psdlearning.com/http://www.melissaclifton.com/tutorial-warholphoto.html
Strobist Photography (flash photography for non nerds)
other than the flashgun (which there are many types of), the following equipment is also used for the typcal strobist:
wireless triggers - transmitter and receiver pairing which allows your camera to talk to your lighting equipment (flashgun etc)
Lightstand - attache your flashgun to this to allow you to shoot light from wherever you want.
umbrella - can shoot through the umbrella, or reflect onto the inside of a reflective mirror to diffuse the light from your flashgun (makes the light softer, gives less harsh shadows)
Snoot - directs the light towards one specific point in a tube type format
For setting up a DIY studio for macros:
http://strobist.blogspot.com/2006/07/how-to-diy-10-macro-photo-studio.html
Photography terms
Useful links
http://www.photofriday.com/calibrate.php
http://www.cambridgeincolour.com/viewing.htm
Freeware for making panorama pics:
http://download.cnet.com/FxFoto/3000-12511_4-10304500.html?t
http://download.cnet.com/Panorama-Perfect-Lite/3000-12511_4-%2010459396.html?tag=mncol
Reliable Internet source of brand new Equipment:
http://www.warehouseexpress.com/
ND filters group on Flickr:
http://www.flickr.com/groups/neutraldensity/
Printing your digital images:
http://www.togsprint.com/
General photo goodness:
http://www.photoanswers.co.uk/
http://www.bighugelabs.com/
HDR Tutorial:
www.vanilladays.com/hdr-guide/
Help with Smoke photography:
http://photocritic.org/artsmoke-photographing-smoke/
Lens hire:
http://www.lensesforhire.co.uk/
How to set up your own macro strobist studio:
http://strobist.blogspot.com/2006/07/how-to-diy-10-macro-photo-studio.html
iphone apps for photographers:
http://www.photoradar.com/reviews/buying-guides/top-10-iphon e-apps-for-photographers
Post Processing (plus handy CS4 shortcut sheet)
Aperture
Photomatix Pro - Much better than CS4 for making HDR images, in fact pretty much best of all for HDR as far as i can tell.
Lightroom series - Great for organising your photos and has all the features you'll need for most of the adjustments you'll make to your pictures and it's all set out very nicely.
Here are a few shortcuts for CS4 - kindly supplied bybuckajack2.0:
Photographic Techniques
Contre-jour produces backlighting of the subject. This effect usually hides details, causes a stronger contrast between light and dark, creates silhouettes and emphasizes lines and shapes. The sun, or other light source, is often seen as either a bright spot or as a strong glare behind the subject. Fill light may be used to illuminate the side of the subject facing toward the camera. (Thanks wiki)
Photographing smoke trails: - thanks to Uhuqle:
black background - - smoke - - camera
- - - - - - - - - - - - - ^ light ^
Just make sure the light is bright enough and not shining on the background or back at the camera. Ideally an external flash is best because you want good contrast but I just used some desk lights. When you process the picture invert it to get the white background and then play around with the colours.I didn't have an incense stick so I rolled up and twisted tight some paper towel, light it and then put it out and let it smoulder. Produced really good smoke trails. Hope that helps.
Candid Photography:
There's a number of ways you could approach it.
1) A 300mm lens, hide across the road, photograph people doing what they do, crop.
2) 50mm, right in their face, laugh about it with them afterwards
3) Find a tramp, give him a quid to take his photo, B&W the hell out of it, win.
4) Go to a party, introduce yourself as a photographer, explain you'll be taking photos. After 5 minutes they'll have forgotten about you. Take candid photos.
5) Shoot from the hip (in other words, aim the camera when it's by your side - don't raise it to your face)
There's a few ways you could do it without getting decked.Or, you could do the permission based version - 'Portraits'
Equipment Part 3 - Accessories/Filters
As Diego says, B+W is a manufacturer of filters. German if I remember correctly. That means you're getting Teutonic Deutsch Efficiency and a top quality product. They're not cheap though - so make sure you get the biggest one you can afford otherwise you may be fooked later...I'll explain that further - when I started out, all my lenses were 58mm filter thread. So I bought the 58mm ND110. No problem with that - I didn't have any bigger threaded lenses.Now though I have a 5DMKII and I'll be buying a lens purely for landscapes - but that has a 77mm filter thread (I think). My B+W won't fit and I'll need to buy a 77mm ND110 You can buy 'step-down' rings which you can attach to your filter to get it to fit a smaller diameter thread - so you can make a 77mm filter fit a 58mm thread... but you may need to remortgage to get a 77mm B+W ND110.Yes, it was me who had some extreme waterscapes taken with it... but I've not done a 10 minute exposure yet... basically the 10 stop filter takes away 10 stops of light meaning you have to expose 10 stops longer to get a correct exposure.
In real world terms - if your camera meters a correct exposure of 1/125th at f16 without the filter on, the correct exposure with the filter on is only 8 seconds at f16. (And so on)Now, to be fair - if you're doing sunsets and whatnot then light is going to be fading fast and you may find that an ND4 or ND8 may give you the results that you want. If I remember rightly, an ND4 is a 2 stop filter, the ND8 is a 3. Normally this is plenty for already low-light shots, and it's what most of the sunset at the coast type pictures you see on the front of photo mags are taken with. These are cheaper than the ND110!Where the ND110 comes in handy is for daylight shots where you want the long exposure to smooth out the water, or blur a waterfall... Otherwise an ND8 or ND4 may work fine...Then you have the choice of whether or not you want a screw in filter (attaches to the front of your lens - the B+W only comes in screw in form) or a slot in one.
The slot in ones (usually Cokin 'P' series - or something labeled 'P type' - for amateurs) have one benefit in that they are square/rectangular and slide into a holder - meaning that no matter what thread size you have on your lens you can use the filter!You do need to buy some bits though... you need a holder for the filters, and a mounting ring for the lens. You buy a mounting ring to match the thread size of the lens you're using, screw it in, attach the filter holder, then slide your filter in. If you have different size thread lenses you just buy different mounting rings - everything else is the same... You do get a much more varied range of filters though...The Kood series (compatible with the 'P' format), while cheap, is quite good - have a look at http://www.premierink.co.uk/ for pricing.
Finally you have the ND Grads. These are filters (again ND4, ND8 etc) which are grey one half, the other half clear. These are typically used for landscapes - as the sky is usually much brighter than the ground if you use an ND grad with the grey bit over the sky then you can get nicely detailed clouds without blowing the highlights. As there is no filter over the ground then that exposes perfectly as normal.In my camera bag I have...Cokin P filter holderCokin P 58mm mounting ringCokin P ND8Kood 'P' ND8 gradB+W ND110
More on ND Filters:
Ahh - but it depends on what you want your filter to do.
If I remember correctly, an ND8 = 0.9 which is about a 3 stop of light reduction. The ND110 = 3.0 which = 10 stops of light.So, if you're shooting at night, and want to go a bit longer with the exposure an ND8 will probably suffice, it'll get you a 30 sec exposure. But - if you want a daytime long exposure your ND8 won't do a damn thing. The ND110 will give you around a 30 sec exposure into bright sunlight, minutes elsewhere during the day. Sunsets you're talking minutes as well. But it depends on what you want to do with it. If you're after late eve - night time 30 sec exposures flattening out water, ND8, maybe two stacked together is the way to go. Obviously if you buy 3 of them and stack them you're getting close to a 10 stopper...If you want daytime long exposures then get yourself a 10 stopper The prices for the 110 are expensive - but it gets the job done
10 stop - Removes 10 'stops' of light. Basically means exposures take 10 times (or more) longer than when not using it. Allows you to do really long exposures and completely smooth out the ripples in the water. Rodney Trotter's (in 58mm thread size) cost £41 incl next day delivery from Warehouse Express (B+W ND110 if you're going to look for it) http://www.flickr.com/groups/nd110-filter-group/
Basically, that filter gets rid of 10 stops of light and you've got to get
them back somewhere in order to have a correctly exposed photo. So, you could up
the ISO, have a larger aperture or slow down the shutter speed.What I do is
compose the shot with the filter off and make a note of the readings. Then I put
the filter on, camera to manual focus and manual settings. I make the aperture
the same as I took the reading from, the shutter 10 times slower than before and
take the pic.Then I check the histogram to see if there's a nice even spread or
any blown out or underexposed areas. If so I adjust accordingly.It's not an
*exact* science and it's all down to experimentationPolarizing Filters:
Polarizing filter removes reflections and increases color saturation without affecting the overall color balance. It’s the most useful filter for landscape photographer, followed by the graduated neutral density filter, which could be replaced by the high dynamic range technique. Polarizer filter reduces haze and reflected sunlight. It has the most effect when shooting at a 90 degree angle from the sun. Get the best result when sun is overhead or behind you and close to the horizon. Polarizer filter has an attached rotating ring for orienting the polarization angle, rotate the ring will adjust the effect. There are exceptions, when the field of view is too wide, you will see uneven blue in the sky, or, you are taking multiple exposures for photo stitching, polarizer filter should not be used in these cases. (cheers to photo 96.com)
Equipment Part 2 - Lenses
Lenses come in all shapes and sizes - listed below are some types of lenses and what they do, I will talk as if you have a cropped sensor as most people who need advice on lenses and focal lengths will probably be using a cropped sensor body:
Wide angle lenses - from 10mm - 50mm. those at 10mm-15mm are usually 'fish-eye' lenses where they are so wide, you'll struggle to keep your feet out of the frame. have a very wide angle of view - sometimes up to 180 degrees and beyond
'Normal' lenses - around the 35mm mark (50mm on a Full Frame) - see roughly what the human eye sees, hence photos have a very natural feel about them
Portrait/Short telephoto Lenses - The photography gods say that a good portrait length is roughly between 50mm and 105mm on a full frame camera, so roughly 75mm to 113mm on a cropped sensor. This sort of focal range is good for portraits, weddings and as a general walkabout lens. usually 18-55mm would be a short telephoto, alternatively 24-70mm etc etc
medium/long telephoto lenses - These are generally for wildlife and sports photography, although 200-300mm top end can also be used as a wedding/portrait lens. They tend to be very heavy, and the better/faster lenses (constant F/2.8 aperture) are very very heavy and very very expensive. Someone aptly described them somewhere as a 'paedo lens', cos they look quite noncey.
Prime / fixed focal length lenses - do not zoom at all, hence you have to 'zoom with your feet', but they generally offer excellent picture quality (even the cheaper primes), and they are generally extermely fast (opening up to 1.8/1.4/1.2 in expensive lenses). You can get primes lenses at all types of focal lengths, and photogrpahy 'purists' often only use these and not zooms, although the quality of zooms now is such that you don't need to have lots of primes, unless you are a poncy geek.
MAKE SURE YOUR LENSES ARE COMPATIBLE WITH THE MAKE/SENSOR ON YOUR CAMERA!
Compatability with cannon 5D lenses:
Thanks to Rodney once again!
Trust me, I did so much research on what lenses were Full Frame compatible when I made the switch! Avoid Sigma DC and Tamron Di II!
Right. Firstly sell the 10-20 unless you want extreme vignetting!
For wide angle, look at the Canon 17-40 f4L. That will almost be as wide as your Sigma. Try for 2nd hand as they are costly.The 24-105 covers your walkabout range The macro is a good macro A 70-200 f4 (is) would be good - they're fairly cheap (explore the sigma option if you want it cheaper) And you can't go wrong with a 50mm f1.8 on Full Frame.
Cannon 50mm 1.8 'nifty fifty' - An absolute no brainer if you have a cannon DSLR - £75 quid new, just buy one already
Cannon 'L' Glass - Top of the range lenses from Cannon - built like brick shithouses, fast as you like (constant f/2.8 throught the focal range) and crisp across the focal range and wide open. Will potentially get you divorced due to the massive cost, but you get what you pay for - i.e. great photos and envious looks from the proles.
I have attached a link here for ALL Nikon lenses in existence - if you can't find it here, it doesn't exist:
http://www.photosynthesis.co.nz/nikon/lenses.html if you visit this website and it's helpful please thank the guy or click on his ad links please
Here is a similar list for Canon Lenses before i get shouted at:
http://www.bobatkins.com/photography/reviews/best_canon_eos_lenses.html
again, if this is helpful to you please click on the guys ad links or say ta if you can
Equipment Part 1 - Camera Bodies
Question: I want to get back into photography, dont mind splashing out on a DSLR. Any good pointers for a camera? Willing to spend upto £400, is that enough?Also want to get to know how to use my camera effectively, any good guides?
Supamatt:
I'd personally go either the nikon/canon route. They're market leaders for a
reason, but i know others have brands they're happy with. If you really get the
bug and want to upgrade, i dont think any of the other manufacturers
camera's/lenses are as good. There probably isnt a great deal of difference at
entry level though.I'm a canon user so would happily recommend them. A 2nd hand
camera would be fine and you could easily pick one up for under £400, possible
with a couple of lenses too. But i'd personally go for a camera with live view,
where the picture you're about to take is shown on the LCD, and older cameras
tend not to have it. I dont have it on mine and its something i think would
really come in handy.Question: Evening gents, I don't want to hi-jack this thread but I've got a really quick question. If I'm not a pro photographer and don't want to be will I be able to tell the difference in quality between the likes of the D90, 1000D and the D300, 7D?I just need to be able to justify the extra cost!
If you don't want to be, then start off with something like a 1000D (or better a 450/500D) and then if you get into it you can move up to a 7D or something tasty like that - the lenses will still fit... (unless you buy EF-S lenses and try to
put them of a full frame camera - but you don't need to worry about that yet).If you prefer Nikon then go for a D60 or D5000 to start with - but I can't help you out with those as I'm a Canon 500D user (who will be upgrading to a 7D in April)
Edit - watch out with Nikons, the D60/D40 and D5000 don't have autofocus motors built in, you need to buy lenses with af motors in them instead - otherwise you'll have to manually focus everything. - Rodney Trotter
Canons: Effectively. x00d's are the beginner - amateur range, x0d's are serious amateur -semi pro and xd's are the daddies.Depending on budget, look at the about to be released 7d. Looks like it's the replacement for the 40/50d but on steroids - Rodney Trotter
Theory for beginners Part 2 - Reciprocal rule and Rule of 3rds
Once again thanks to Redharzo for the sterling work
Reciprocal rule: how to minimise camera shake when you don't have a tripod.
Ok, this is just a general purpose rule. We need to start back in olden days when film was still used. The rule states:- you can handhold a camera with lens of length X mm provided your shutter speed is 1/X or quicker
NB - this is without a tripod.
eg: you're using a 100mm lens. To minimise shake, you need a shutter speed of 1/100
eg: you're using a 200mm lens. To minimise shake, you need a shutter speed of 1/200
eg: you're using a 300mm lens. To minimise shake, you need a shutter speed of 1/300
However, that only works for full frame. Most digital camera sensors aren't as big as a 35mm negative. The usual multiplier is 1.5x or 1.6x. We'll use 1.5x for simplicity of counting.
So when a film lens is used on a digital camera body:-
a 100mm lens is effectively 150mm-
a 200mm lens is effectively 300mm-
a 300mm lens is effectively 450mm
Therefore: -
rather than using your 100mm lens at 1/100, you must use it at 1/150-
rather than using your 200mm lens at 1/200, you must use it at 1/300-
rather than using your 300mm lens at 1/300, you must use it at 1/450
So, in summary - for a digital body with a film lens:- you can handhold a camera with lens of length X mm provided your shutter speed is 1/1.5X or quicker
The rule of thirds is a compositional rule of thumb in photography. The rule states that an image should be imagined as divided into nine equal parts by two equally-spaced horizontal lines and two equally-spaced vertical lines, and that important compositional elements should be placed along these lines or their intersections. Proponents of the technique claim that aligning a subject with these points creates more tension, energy and interest in the composition than simply centering the subject would.
FOLLOWING THE RULE OF THIRDS WILL MAKE YOUR PHOTOS LOOK MUCH BETTER - A LOT OF PEOPLE IGNORE THIS INITIALLY AND REALISE AFTER A WHILE THEY SHOULD HAVE FOLLOWED THE RULE OF THIRDS - TRUST US.
Theory for Beginners - Noobalicious deliciousness
Basic terms:-
Aperture; literally the measure of the hole in the front of a lens. Units: f stops.-
Shutter speed; the length of time that the film or sensor is exposed to light. Units: seconds.-
ISO - the sesitivity of the sensor on your camera to light
Depth of field; how ‘deep’ into a picture everything is focused.-
Zoom lens; lens with a variable length. Units: mm.-
Prime lens; lens of fixed length. Units: mm.
Most important concept: taking a photograph is like baking a cake.-
In cake making you have two variables: heat and time.- In photography you have two variables: aperture and time.
Think about taking a photo as ‘baking with light’.- Sometimes you want to use lots of heat/light for a short time.- Sometimes you want to use a little heat/light for a long time.The situation you are in and the effect you are trying to achieve will help us decide the balance of light and time necessary.
Camera settings (will vary slightly from camera to camera):-
P: program mode – camera sets both aperture and shutter speed-
A: aperture priority – you set the aperture, camera calculates shutter speed-
T: shutter priority – you set the shutter speed, camera calculates aperture-
M: manual – you set both manually
Always remember: combination of two variables. How much light and how much time to ‘bake’ the image.
To reiterate the basic idea:
If we use a short time, we need lots of light.
If we use a long time, we need a little light.
If we have neither, we can up the ISO (sensitivity of the sensor)
ISO is something that began in film cameras.
ISO refers to the speed of the film, or rather it's sensitivity to light. The faster the film is the 'faster' it is to expose correctly to light (it is more sensitive).
ISO stands for International Organization for Standardization and is basically a standard for measuring it.
In a digital camera, you generally get ISO settings 200, 400, 800 and sometimes higher. The higher the number, the more sensitive the camera will be to light. Obviously, a higher ISO can be a great help in low light situations. However, if at all possible, a longer shutter time should be used instead of raising the ISO. Unfotunately, this is not always possible (action shots would be blurred etc). The reason longer shutter should be used over ISO is that the higher the ISO level, the more noise, or distortion is introduced into the image (making the image seem fuzzy). Use the lowest ISO you can unless you have no other option
How do you decide on the combination of light and time?
Let’s focus on time first.
Ok, you’re at a football match and you’re taking pictures. You want to get a nice, crisp, sharp shot of a good save by the goalkeeper. In this case, we want to freeze the movement of something moving quite quickly (the goalie diving). So we’ll need a short length of time to prevent blurring.-
To freeze action, we want short time. - Short time needs to be balanced by lots of light.
How do you decide on the combination of light and time? Part 2
Let’s focus on time again.
Ok, you’re at a waterfall high in the mountains somewhere. You want to try to convey the flow of the water with a little bit of blur rather than freezing the water. In this case we want to use a lot of time to blur the water and give a nice effect.- To blur action, we want long time. - Long time need to be balanced with little bit of light.
Depth of field: how deep into the picture is in focus.
A new memory aide: depth of field is like water in a hosepipe.- if the hosepipe is narrow, the water goes far- if the hosepipe is wide, the water doesn't travel- if the aperture is narrow, the depth of field is deep- if the aperture is wide, the depth of field is shallow
How do you decide on the combination of light and time? Part 3.
Let’s focus on aperture for a little bit.Ok, you’re up in the mountains and you've found a flower that you want to shoot. But you only want the flower in focus, not everything behind it, so that the flower stands out.- For shallow depth of field, we want a wide aperture.- Lots of light needs to be balanced by shorter time.
Big aperture = More Light = Low F number = Small Depth of field
How do you decide on the combination of light and time? Part 4.
Let’s focus on aperture for a little bit.
Ok, last one; you're still in the mountains. You've found a great scene and you want everything in focus; the flowers in front of you and the mountains behind. We need deep depth of field.- For deep depth of field, we want a narrow aperture.- Little light needs to be balanced by longer time.
You have 4 options when working out the balance of light and time. Decide which of the 4 is most important:-
freeze the action-
blur the action-
have shallow depth of field-
have deep depth of field
Pick one and work from there!