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[Rollei] Re: OT: retrofocus & inverse square



I'm waiting for someone to resurrect the clever Goerz solution employed on this lens rather than have us buy a 400 dollar custom filter...

Eric Goldstein

- -----Original Message-----
From: Richard Knoppow <dickburk  >
Sent: Jan 9, 2004 2:07 PM
To: rollei  us
Subject: Re: [Rollei] OT: retrofocus & inverse square


   BTW, while the fall off of a "normal" lens is given as
cos^4 theta (theta being the image half-angle) some lenses
have more for various reasons. The famous Goerz Hypergon is
an example.
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