The K 20 mm f4 is probably one of the few lenses that are considered inferior to it's M counterpart.

You can read about it at Stans comments web site.

http://stans-photography.info/

David Chang-Sang wrote:

Ahhhhhhhh

So my weekend turned into a month away.. that's what happens when you go to
New York and then find out while your there that a close friend has passed
away and then your parents are vacationing in Nicaragua so you have to tend
to your 91 year old Grandfather... but I digress.. I'm back.. and I have a
question regarding a K-mount manual focus lens.

I spotted a 20mm F4 SMC Pentax (no M designation) around town and I was
curious how it compares to the Pentax-M version - are they the same?
(virtually)?  Boz's site lists it as 10 elements in 12 groups vs the 8 and 8
that is the Pentax-M - it's heavier than the M and longer too but how does
it compare optically?

Anyone have any ideas?

Thanks,
Dave







--
I can understand why mankind hasn't given up war. During a war you get to drive tanks through the sides of buildings and shoot foreigners - two things that are usually frowned on during peacetime.
--P.J. O'Rourke





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