http://www.users.globalnet.co.uk/~recb/contax_g/hacks.htm
http://www.vanwalree.com/optics.html Poke around here ... there might be something that can help you. It's been a while since I visited these sites, and I don't recall all that they offer. Shel > [Original Message] > From: David Zaninovic > Anybody knows how to calculate lens hood exit diameter if hood length and lens angle of view are known ?
