Discussion in 'Beyond the Basics' started by grooski, Jul 20, 2004.
I've herd about macro and the ratio like 1:1 or 1:3. But what does it meen?
1:1 means that the size of the image on the negative is the same size as the subject, that is, a picture of a bee 1:1 would be life size on the neg, as opposed to 1:3, where it would be 1/3 lifesize.
so where would the focal length come in with the ratio
I think the ratio is a result of the focal length combined with how close the lens can focus.
You could do macro with a 100mm lens or a 300mm lens. You could get the same ratio depending upon how close the lens is able to focus.
Focal length comes into play with how close you have to get to the bee to get that 1:1
It might only be a few inches, but with bees, spiders, poisonous snakes, etc... that might be a big deal.
I'm sure it also affects the macro subject similarly as focal length affects non-macro shots. Wider lenses will exagerate distances between near and far objects, and long lenses will flatten the image.
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