Do you have a question? Post it now! No Registration Necessary
- Phil Allison
March 18, 2005, 6:43 am
rate this thread
** The depth of field ( aka depth of focus) of a lens with a small aperture
is very wide - even a moderate telephoto lens can, when set to F16 or
higher, be in good focus from a couple of metres to infinity.
Interestingly - the depth of field of a lens depends only on the size of
the field of view and the F number. When the subject is very small ( ie
like a postage stamp) then the depth diminishes to a millimetre or so.
- » Re: How could the camera on missiles and smart bombs keep its focus?
- — Previous thread in » Electronics Down Under
- » best supplier for fast shipping prices/service
- — The site's Newest Thread. Posted in » Electronics Design