On Tue, 29 Nov 2005, Godfrey DiGiorgi wrote:
Be aware that the difference in field of view between 90 and 105mm is quite
small. See
http://homepage.mac.com/godders/2zmFoVcomp.jpg
for comparison. The real advantages of the 24-90 are much more field of view
at the wide and and better performance when wide open at the tele end.
Thanks, Godfrey. Can you help me understand your diagram? Is the
small, green rectangle the FOV at (more or less) 90? Here is an
exercise I would like to solve: "Assuming a lens at 90mm and another
at 105mm, how much closer to the subject should one go so as to get a
photograph with the same dimensions on the recording medium".
Cluelessly yours,
Kostas
