Thats a total myth in my opinion. If you consider the actual time to change the lens of M42 vs K its a few seconds at most, and if you consider the actual time of the whole process ( take old lens off, put caps on front and rear, put back in lenscase/bag, get new lens out of bag/lenscase, remove caps, install new lens) the difference is miniscule. If you dont do these things and just have a bunch of loose lenses ready to mount and dismount it becomes slightly more than miniscule, but IMHO the mounting method TIME difference is not signifigant at all. The benefit of bayonet mount is not just slightly easier to mount, the benefit is it makes for simpler lens/body coupling due to consistant lens positioning too. There are some disadvantges to K mount bayonet mounting compared to screw mounting too, do you know what they are? One of them makes M42 mounting FASTER than k mounting. The other has to due with opto-mechanical accuracy.
jco -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of John Whittingham Sent: Wednesday, February 14, 2007 5:58 PM To: Pentax-Discuss Mail List Subject: RE: Pentax K 28mm f2.0 Lens > I think that a true M42 DSLR could/might be produced eventually. There > are just too many good M42 lenses out there for it not to happen. > Somebody will eventually fill that niche, not Pentax though. jco I've got to be perfectly honest here, leaving asside the autoaperture debate, which I have my own views on. The last time I used an M42 lens and there are some very good ones, I came across the same problem I did originally. If you have to change lenses, fast, as I do, frequently, it is a total PITA. You can keep them, if I need one, I'll buy an adapter and put up with the reduced functionality even.......dare I say it, using the green button 8) John ------------------------------------------------------------------------ ---------------------------- The information transmitted is intended only for the person to whom it is addressed and may contain confidential and/or privileged material. If you have received an email in error please notify Carmel College on [EMAIL PROTECTED] then delete all copies of it from your systems. Although Carmel College scans incoming and outgoing emails and email attachments for viruses we cannot guarantee a communication to be free of all viruses nor accept any responsibility for viruses. Although Carmel College monitors incoming and outgoing emails for inappropriate content, the college cannot be held responsible for the views or expressions of the author. The views expressed may not necessarily be those of Carmel College and Carmel College cannot be held responsible for any loss or injury resulting from the contents of a message. ------------------------------------------------------------------------ ---------------------------- -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
