First off-- I have to admit--I avoid the full frame section like the plague. I don't think much good comes out of all the redundant discussion on the same topics over and over and over again. That said I never thought I would be posting anything in here, but here goes nothing
My questions and/or topic of discussion is
NOT about equivalence although I will reference angle of view to some degree.
What I am curious about is for those on the forum who are in the know to talk about
a specific aspect of angle of view as it pertains to lenses.
Here is what I am asking/thinking of. Lets say I took a picture of a person standing in front of a scene with a DA21mm lens on my K3. Now lets say I never move my tripod, model, scene, or anything and I put a FF Pentax camera on the tripod with a FA 31mm lens. I am interested in how the scene would look, and the differences therein.
Would the person appear bigger or smaller in one or the other? Would there be any noticeable differences? I am not asking about sharpness, bokeh, or anything else. I am asking about a 'perspective' question....Just to keep it simple lets say BOTH lenses were set on f8 for the mythical test.
For the record the 21mm has a horizontal FOV of 59 degrees and the 31mm would have an angle of 60 degrees on each respective camera. The field of view, while not exactly identical, is still pretty close.
Bonus points if you can show an uncropped side by side comparison of the test I mentioned.
Again it's not about sharpness. It's not about rendering. It's also not about about depth of field, or resolution or any of that. It's about how the different focal lengths of the lenses will record the same scene.
Discuss.
---------- Post added 07-30-15 at 08:56 PM ----------
As a reference here is a Pentax Forum home page article.
A Guide to Perspective Distortion Review - Introduction | PentaxForums.com Reviews
---------- Post added 07-30-15 at 09:11 PM ----------
My theory is that the 31mm lens on the FF camera will bring my model out much more prominently in the same scene than the 21mm will. Not because of any sensor magic, but because it is a longer focal length.
It will make a much more prominent subject (ie the model).
I am not 100% sure on this, but what say you?
Last edited by alamo5000; 07-30-2015 at 07:00 PM.