Greg Stempel wrote:
the shallower your depth of field (AKA; depth of focus).
I thought depth of field and depth of focus were different concepts... :-\
Depth of field refers to the amount of apparent sharpness generated in a
photographic print or slide, controlled by distance of viewing, size of
print, focal length and aperture
Depth of focus refers to the depth of apparently sharp focus generated
by a lens at the sensor plane e.g. film inside the camera, i.e. above
and below that plane.
Depth of field increases with increasing angle of view - i.e. the more
"wide angle" the lens is the greater the depth of field.
Depth of focus increases with decreasing angle of view - i.e. the more
"telephoto" a lens is. Thus trying to use a 80mm enlarger lens is not a
good idea with 35 mm film (best is 50mm) because the depth of focus is
bigger making it harder to focus accurately. (I have checked this out in
the past using the same apertures!)
I don't think I'm being pedantic - anyone there who can confirm?
Howard
