The coverage angle stated for the 17mm f/4 (180°) is measured across the
diagonal of the frame. Your finding of 110° is correct for measuring across
the frame. Asahi presumably gave the 180° rating as a way of exaggerating
(with qualifiers) the angle of view. I have no suggestion for a wider lens
though I am sure they exist
Paul M. Provencher (ppro)
-----Original Message-----
From: Cyril MARION [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 02, 2001 5:32 PM
To: [EMAIL PROTECTED]
Subject: Fish eye lens
Hello happy Pentax users,
I joined you just some minutes ago and already have a question .
I'm looking for a fish-eye to use on my SUPER A. Recently I tried a 17mm
f/4.0 fish-eye M type and found that it does not cover the presumed HFVO of
180°, just something arround 110/120°.
I need to know if it's normal.
Additionally, what would be the price for such a 2nd hand lens ?
Thanks for your time,
Regards,
C.MARION
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