Nov 17, 2008, 13:22
Thank you Mitch and Matthew!
the L.L. article supports my idea that DOF appears shallower when using longer lenses, due to the perspective "compression".
I am still ruminating about how it can be that if closer focussing distance should produce larger DOF, we
usally find that with wide angle lenses, which have to be used comparatively close to an object, we have the greatest difficulty blurring anything in the picture.
My explanation so far is that with a wide angle lense the field of view covers only a short distance, so that most if not all of the DOF lies within the FOV. Is that tentatively correct?
As for macro lenses and their specific peculiarities, I have to read more. I did not really understand the pupil magnification factor, and it is odd that with macro lenses, getting even closer DOF is reduced now.
Twisting my brain indeed! And having fun doing it too
Uli
the L.L. article supports my idea that DOF appears shallower when using longer lenses, due to the perspective "compression".
I am still ruminating about how it can be that if closer focussing distance should produce larger DOF, we
usally find that with wide angle lenses, which have to be used comparatively close to an object, we have the greatest difficulty blurring anything in the picture.
My explanation so far is that with a wide angle lense the field of view covers only a short distance, so that most if not all of the DOF lies within the FOV. Is that tentatively correct?
As for macro lenses and their specific peculiarities, I have to read more. I did not really understand the pupil magnification factor, and it is odd that with macro lenses, getting even closer DOF is reduced now.
Twisting my brain indeed! And having fun doing it too
Uli