Photography > Photographic Techniques General Discussion > Archive > 2007-05-25 Latest [ Topics | Posts ] Archive Post A New Topic Archive of 2007-05-25 < Previous Day Day 398 of 457 Next Day > Topic Title Topic Starter Posts Time Computation of focal length "BrJohan" ... 1  22:28:57 Archive of 2007-05-25 < Previous Day Day 398 of 457 Next Day > About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup tan12V112 Fri Nov 21 23:35:13 CST 2008.