rule of thumb

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bilko2

Original Poster:

1,693 posts

233 months

Tuesday 8th February 2005
quotequote all
I know about the rule of thirds where you imagine a grid over your framed subject in order to compose it properly but i wondered what other usefull rules of thumb there are.
I remember someone saying about shutter speed =>focal lenght for crisp images, i think
Also i heard there is a rule called the sunny 16 rule.
just wondering if anyone would like to contribute meanings to these and any other useful rules they know.

_dobbo_

14,393 posts

249 months

Tuesday 8th February 2005
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A good post by PhilBlade here with some advice of that kind...

dcw@pr

3,516 posts

244 months

Tuesday 8th February 2005
quotequote all
the focal lenght/shutter sped one is quite simply, and useful to know

the shutter speed should be eqaul or greater than the reciprocal of the focal length. So if you are using a 300mm lens, your shutter speed should be 1/300 or faster. Remember that if you are using a DSLR with a crop factor of sort then this must also be taken into account. So if you are using a D100 (with a magnification effect of 1.5) then you will need a shutter speed of 1/450 for the same 300mm lens

V6GTO

11,579 posts

243 months

Tuesday 8th February 2005
quotequote all
Bilko,
I've never heard of the Sunny 16 thingy, but the focal length/shutter speed one states that the two should be roughly the same figure to avoid camera shake. ie 28mm lens = 1/30th sec min...300mm lens = 1/300th sec min etc etc. Of course, Image Stabalising lenses shoot that theory right out of the water but it's a rule that has done a lot of good service to a lot of photographers. You can break the rules if you can, say, steady the camera against a tree or a wall also.
It is only a rule of thumb though. I have a very steady hand and I have taken ultra crisp shots 2 full stops lower than the rule would allow.
Hope this helps.

Martin.

simpo two

85,556 posts

266 months

Tuesday 8th February 2005
quotequote all
'Sunny 16' sounds to me like the guide on the inside of film cartons years ago. Based on 100 ASA, you'd use f16 for sunny, down through f11 and f8 for 'hazy bright' to f5.6 for 'Cloudy'.

bilko2

Original Poster:

1,693 posts

233 months

Tuesday 8th February 2005
quotequote all
Excellent replies
Thanks, i shall be looking at that article phil wrote.
Brilliant
Been out all day taking pics and i feel so good now. Strange that a release of creatism? can have you buzzing so.