If the flange isn't wide enough you won't be able to modify the lens to lock onto the camera body. There can be other mechanical problems as you have also mentioned.
J. C. O'Connell wrote: > thanks for the tip. It looks like this lens won't > work ( mamiya 55mm F1.8) because the hole that > would need to be drilled in the lens's flange > would be interfering with the lens's aperture > setting ring movement. drats! Seems like you said, > this can only be done on M42 lenses that have > large diameter flanges at the mount.... > jco > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of > P. J. Alling > Sent: Saturday, April 14, 2007 12:34 AM > To: Pentax-Discuss Mail List > Subject: Re: converting a M42 lens to PK mount? > > > It would depend on which lens you were trying to permanently adapt. > Something like the SMCT 135 f2.5 with it's large base would be > possible. Remove the spring from the adapter that locks it into the > camera body. I don't have an adapter available but I think the tapped > hole for the screw that holds that spring goes entirely through the > adapter, if so you can simply get a screw with the same thread that's > slightly longer to hold the adapter in place. Next mount the lens on > the camera and mark where the lens lock falls on the lens body. Drill a > > small hole to match that location. If the lens has an A/M switch you're > > all set. Otherwise you'll have to find a way to keep the stop down pin > in place, (a dab of super glue would work). > > J. C. O'Connell wrote: > >> Could somebody refresh my memory? I >> want to permanently adapt a M42 >> lens to PK mount such that the mount adapter >> K stays on the lens all the time and >> the lens mounts and dismounts from >> PK bodies just like a K lens. >> >> Is this possible and how do I do it? >> >> I am sure I could figure it out >> if possible, but why waste the time >> if its not. >> >> thanks in advance, >> jco >> >> >> >> > > > -- Entropy Seminar: The results of a five yeer studee ntu the sekend lw uf thurmodynamiks aand itz inevibl fxt hon shewb rt nslpn raq liot. -- PDML Pentax-Discuss Mail List [EMAIL PROTECTED] http://pdml.net/mailman/listinfo/pdml_pdml.net
