Hi Gang,
When choosing the 20-35, it was helpful to do some optical
calculations. So I made a Javascript lens calculator
intended eventually for eosdoc. The current draft is at:
http://members.home.net/jul.loke/
The formulae used were from David Jacobson's Lens FAQ
http://www.photo.net/photo/jacobson/
Any feedback is appreciated.
Cheers
Julian Loke
P.S. Compare it with other online calculators
http://members.home.net/gillettm/DOF.html
http://www.smu.edu/~rmonagha/brondof.html
http://www.dof.pcraft.com/dof-frames.cgi
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