I think there was another side to the story as well. Some of the early bayonet mounts, like those on the Nikon rangefinders, loosened up right away. With a screwmount, the lens would always mount tight if you kept turning it. Unfortunately, when the day arrived to locate electrical contacts and what not on the mount, the indexing of a bayonet mount became highly desirable. But I'm just guessing here. I could be wrong.
Paul
On Sep 4, 2004, at 8:51 PM, frank theriault wrote:


On Sat, 4 Sep 2004 20:41:51 -0400, Paul Stenquist
<[EMAIL PROTECTED]> wrote:



True Frank, but there were two sides to that story. Those of us who were using screwmount in the seventies were none too happy to see Pentax obsolete our lenses. I think the company was torn between being loyal to their user body and meeting the competition.


Yeah, good point, Paul. In retrospect, 't'would have been better to simply put a bayonet mount on the original Spotmatic. I know m42 users would have been pissed at the time, but there weren't ~that~ many of them pre-Spotmatic. I'm sure the Spotmatic and it's variants brought millions into the world of screwheads.

The Spotmatic was so wildly popular, so much a sensation when released
that going bayonet from day one would not have lost too many "loyal"
Pentaxians back then, and likely would have brought on even more new
customers.

But, I think that Pentax likely thought that as long as they, the
worlds largest slr maker in the world, stuck with m42, they were okay.
 Eventually, like Sony with Beta tapes, their isolation worked against
their interests.  That, and the fact that one really needs bayonet to
properly align electrical contacts - but who knew that in '64?

cheers,
frank






-- "The optimist thinks this is the best of all possible worlds. The pessimist fears it is true." -J. Robert Oppenheimer




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