Frantisek <[EMAIL PROTECTED]> wrote: > >Thursday, July 21, 2005, 2:17:13 PM, Shel wrote: >SB> Last week we talked about whether or not an 18mm lens on a Pentax DSLR and >SB> a 28mm lens on an SLR were equivalent. Saturday my friend and I tested the >SB> concept. Here are the results. You decide how close the two lenses are to >SB> being equivalent. > >SB> http://home.earthlink.net/~pdml-pics/2818.html > >I don't see any difference in perspective. The slight difference in >framing can be attributed to two simply "rounding error" - the real >crop factor of the DSLR is more like 1.53x instead of plain 1.5x and >most 18mm and 28mm lenses are not true 18mm or 28mm, and their barrel >distortion can differ as well. But looking for overlapping far/near >objects, I can't see any difference (just as the theories predict).
Agreed. You're always going to see some *slight* differences. These two shots look as identical as any rational person could expect. Both shots would benefit from a red eye removal tool of some sort, though <g> -- Mark Roberts Photography and writing www.robertstech.com
