On a somewhat related note, is there any way to determine by looking at an image at what focal length it was taken? For ex&le, if a wide angle lens was used, the perspective seems more natural if the photo is held closer to one's eyes.
Obviously the compression and lack of DOF associated with a telephoto stands out, but the difference between a 20MM, 24MM, 28MM, and 35MM (for ex&le) does not always seem readily apparent (especially if the photo may have been cropped).....or perhaps it is all just intangible experience??
Any suggestions? Thanks in advance!