The Metering Stop Down Button and the Auto-Aperture mechanism are one and the same. You can't have one without the other, otherwise your metering wouldn't work. The only M42 SLRs that lacked the metering stop-down button replaced it with a dual-mode shutter release (and got the worst shutter release feel in history, that would be the Chinon CM-3 and IIRC the CE-3 as well).
I don't really give a shit about mythical M42 DSLR's. They don't exist and likely never will. 5D's and M42 adaptors exist and work quite well. -Adam J. C. O'Connell wrote: > you are clueless when it comes to M42 usage. > Auto aperture is a VER VERY IMPORTANT > and USEFUL SHOOTING FEATURE all by > itself and there are M42 bodies that dont even > have meters at all that have autoaperture function > ( a whole bunch of Pentax ones too ). > Wake up, and you DID state "all that is missing" > was some sort of metering button. NO, the autoaperture > support for autoaperture M42 lenses is MISSING TOO. > I was talking about a M42 DSLR body which of course > would have autoaperture support for M42 lenses, > there wouldnt be any other reason to make one. > jco > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > Adam Maas > Sent: Wednesday, February 14, 2007 2:30 PM > To: Pentax-Discuss Mail List > Subject: Re: Pentax K 28mm f2.0 Lens > > > Show me exactly where I stated 'M42 adaptors do auto-aperture'. I > didn't. As far as I'm concerned, the metering stop down button IS the > auto aperture feature. They're directly (and physically) connected on > M42 SLR's that feature that capability. That's exactly what I was > referring to when I commented on the metering stop-down button, since > it's all the same basic mechanism. > > You don't need a metering stop-down button if the body doesn't do > auto-aperture and you do if the body does do auto-aperture. There's no > other reason for the stop-down button to exist. > > -Adam > > > > J. C. O'Connell wrote: >> yes you did, you stated that : >> >> "All it's missing is the metering stop-down button." >> >> This is not true or and its very importantly false. >> >> Automatic aperture function of automatic >> aperture M42 lenses is a key feature to making >> them user freindly and is not just a metering feature. >> >> jco >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >> Of Adam Maas >> Sent: Wednesday, February 14, 2007 1:26 PM >> To: Pentax-Discuss Mail List >> Subject: Re: Pentax K 28mm f2.0 Lens >> >> >> I am not mistaken. I never claimed the adaptor does auto-aperture >> (Hence >> >> the note about the lack of stop-down metering switch, which also uses >> the auto-aperture function). >> >> -Adam >> >> >> J. C. O'Connell wrote: >>> I believe he is mistaken, you cannot get a M42 >>> adapter that does auto aperture on M42 lenses >>> and thats what I was talking about, a M42 >>> DSLR that has a real M42 mount and supports >>> auto apeture M42 lenses fully like most M42 >>> film cameras did. >>> jco >>> >>> -----Original Message----- >>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf >>> Of David J Brooks >>> Sent: Wednesday, February 14, 2007 11:01 AM >>> To: Pentax-Discuss Mail List >>> Subject: Re: Pentax K 28mm f2.0 Lens >>> >>> >>> Is the adaptor readlily available out there. >>> >>> Dave >>> >>> On 2/13/07, Adam Maas <[EMAIL PROTECTED]> wrote: >>>> The Canon 5D with the addition of a $10 adaptor is for all intents >>>> and >>>> purposes a M42 DSLR. All it's missing is the metering stop-down >>>> button. >>>> >>>> -Adam >>>> Who shoots M42 on Canon EOS with his ST's >>>> >>>> >>>> J. C. O'Connell wrote: >>>>> Sorry I cant help you out on that one, ( Just got >>>>> my own personal K28/2 sample a few months ago). I have a similar >>>>> goal, I am now collecting the entire "K" series lenses to go along >>>>> with my entire SMCT lens series. A few Ms and As too, but not >>>>> collecting those series. I bet collecting the entire "A" series >>>>> would be a real challange though. >>>>> >>>>> Speaking of the SMCTs, if somebody ever makes a hi-rez M42 FF DSLR, > >>>>> I will be in hog heaven. So far I am seeing really good results >>>>> with the few I tried so far casually on the istDS. >>>>> >>>>> jco >>>>> >>>>> -----Original Message----- >>>>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >>>>> Behalf Of Jim King >>>>> Sent: Monday, February 12, 2007 7:32 PM >>>>> To: pdml@pdml.net >>>>> Subject: WTB: Pentax K 28mm f2.0 Lens >>>>> >>>>> >>>>> As many of you know, I'm a collector as well as a user of Pentax >>>>> lenses. I need a copy of this lens to help me reach my goal of >>>>> owning all of the Pentax K-mount 28mm lenses. If anyone here has a > >>>>> copy which they would be willing to sell me I'd be very grateful. >>>>> Please contact me at [EMAIL PROTECTED] - thanks! >>>>> >>>>> Regards, Jim >>>>> >>>> -- >>>> PDML Pentax-Discuss Mail List >>>> PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net >>>> >> > > -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net
