Originally posted by Yamanobori I am sorry. I thought the argument was effect of cropping an image in regards to perspective--say, using a full-frame senor vs. a APC sensor with the same lens would not impact perspective.
...(summation/paraphrase - off on a tangental discussion about another aspect of perspective),,.
.
Hmm.. Maybe another approach is needed. Do you see how the image sequences I've placed in this thread have more to do with the original subject than your post? Do you see how the effects of perspective radically change the subject's relationship to the background when you move to reframe the shot at a different focal length, attempting to keep the 'subject' size the same?
Understanding this relationship is very important when you talk about
cropping a FF image to match the aps-c FOV (in which case it
doesn't change the perspective, because you didn't move)
...or
moving closer to reframe to the aps-c FOV (in which case it
does change the perspective, sometimes radically.)
100mm 70mm 50mm 28mm
That's what the discussion started to be about, and the images I've shown flesh these issues out perfectly. That's exactly what photographers are talking about when they object to 'moving to get the same FOV' on either format with a prime lens, for example. Your thoughts on linear perspective are interesting, but tangental to the original concern.
.
Last edited by jsherman999; 01-16-2012 at 08:24 AM.