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27-09-09, 01:06 PM
Join Date: Jul 2009
A topic re-visited!!
First I understand the theory behind hyperfocal focusing. However, a question has been perplexing me.
It is the difference between using hyperfocal tables (which appear to give absolute values), and the idea of focusing a third way into the picture.
For example, a table gives a hyperfocal distance of 9 feet at f11 for a lens focal length of 24mm. A question is, is this always the case irrespective of where the horizon (or farthest away focusing point) is? Using the focusing a third into the picture approach, mathematically this example would work if the most distant focusing point is 27 feet in front of the camera. However, what happens if, as would often be the case, the horizon is much further away from the camera eg say 100 feet. Does the hypercocal focusing point become around 33 feet, or is it still 9 feet - quite a difference!
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