Bob,
I would be more tempted to use the phrase "apparent depth of field", since
any two (or more lenses) set on the same camera, sitting on a stationary
object (such as a tripod) and set at the same f-stop, focussed at the same
distance, will have the same depth of field.
It is just the apparent DOF will be greater as the focal length decreases
Ken,
>Another reason for changing focal length is to control depth of field (DOF).
>
>From: "Izzet" <izzet@vizo.com>
>
>
>> Karl,
>>
>> Then does it follow from here that
>> 1-The ONLY reason we loose resolution when we blow up an image on the
>> film is because of the grain and other impurities of the film itself,
>> and
>> 2-The resolution power of the optical system (lens) is infinite.
[||/\/\/\/\//\/|| Ken Sinclair RBP, FBPA.
[|| ||-| Applied Photographic Services
[|| || | Lethbridge,
[|| || | Alberta, Canada,
[|| ||-| (403) 381-1654.
[||\/\/\/\//\/\|| photo1@telusplanet.net
_0___________0______
|___________________ |
O
