Archived posting to the Leica Users Group, 2007/02/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Very impressive - that is an amazing procedure. D/ ----- Original Message ----- From: "Philip Forrest" <photo.forrest@earthlink.net> To: "'Leica Users Group'" <lug@leica-users.org> Sent: Sunday, February 25, 2007 6:54 PM Subject: RE: [Leica] which medium format? > Check medfmt.8k.com for articles on lens hacking. For my modification I > didn't even need to hack the 135 Hektor. I had a Nikkor 135mm lens for my > Bronica ECTL that was a paperweight due to fungus etching the back of the > front lens group. At the time I was attempting to create a 200mm f/4 lens > from an old parts lens SMC Takumar 200 f/4. I had both the lenses apart > and > a host of parts spread about. It turned out that a flange inside the > 200mm > lens had the exact thread dia. and pitch that I needed to fit to the lens > head of the Leica 135 Hektor. I checked the Leica 135 lens head against a > ground glass to see the distance from the lens head flange to plane of > sharp > focus at infinity AND checked to see if this lens had adequate coverage. > After removing a few parts from the Nikkor lens, I had the bare locking > collar ready to mate with the flange. It turned out the lens on the > flange > was a little too close to the film plane and I had to shim it out about > 1.2mm to achieve infinity focus. I left a little bit of "slop" in the > focus > giving it the ability to move past infinity just in case the mount > registration changed a bit or temperature caused some expansion of the > helical. After I got it all fabbed up, I created a jig with a few sets of > metal worker's vise grips and a c-clamp. I secured the lens mount inside > the jig and JB welded the necessary parts together. I let it sit for the > 6 > hours necessary & tested focus. It was spot on just as I had planned. > Now > I have an adapter that will allow me to simply screw on my Leica 135 > Hektor > which is a LOT sharper than the Nikkor offering that I was used to with > the > fungus. I still have the ability to put this lens head right back on my > RF > helical since no modification was made to the lens, only a fabbed up > adapter/focusing mount. > All you need to do this really is a long focus lens with enough coverage > for > 6x6 (many older non-retrofocus long focal length lenses for 35mm have > adequate coverage for 6x6 when they are freed from their native mounts.) > Measure up the registration of the lens elements to the focal plane agains > t > aground glass & start fabbing up your adapters. > If you have a camera that uses lenses in shutter, you'll have to secure a > focusing helical and shutter. A lot harder than using a focal plane > shuttered camera with modular helical like the old Bronica mount or the > early Hassy focal plane shutter cameras. > You could always use a lens cap I suppose... > > Philip > > -----Original Message----- > From: lug-bounces+photo.forrest=earthlink.net@leica-users.org > [mailto:lug-bounces+photo.forrest=earthlink.net@leica-users.org] On Behalf > Of Rose Scollard > Sent: Sunday, February 25, 2007 7:40 PM > To: Leica Users Group > Subject: Re: [Leica] which medium format? > > That sounds like fun - how do you do this? David Scollard > ----- Original Message ----- > From: "Philip Forrest" <photo.forrest@earthlink.net> > To: "'Leica Users Group'" <lug@leica-users.org> > Sent: Sunday, February 25, 2007 11:16 AM > Subject: RE: [Leica] which medium format? > > >> You could also adapt any visoflex lenses to almost any 6x6 MF body with a >> shutter like I've done with my 135 Hektor on my Bronica. Works >> fabulously, >> better than the Nikkor 135 that I was using. >> Philip >> >> -----Original Message----- >> From: lug-bounces+photo.forrest=earthlink.net@leica-users.org >> [mailto:lug-bounces+photo.forrest=earthlink.net@leica-users.org] On >> Behalf >> Of Steve Barbour >> Sent: Sunday, February 25, 2007 1:12 PM >> To: Leica Users Group >> Subject: [Leica] which medium format? >> >>> There's been plenty of talk about how cheap medium format stuff is >>> right now. >>> >>> What would you guys suggest as being the camera to get if starting >>> from scratch? >> >> >> how about an M8... ? >> >> >> >> remember why we are here.... leica people all, wedded to leicas, >> 35mm, small, lightweight, available darkness, great glass... >> >> and all that... >> >> we've got bodies, lenses out the "wazuuuuu"..... >> >> and people now seem to be interested in other..... 'cus it's >> cheap.... ??! >> >> >> well, duhhhh, there's a reason for that... >> >> >> you don't need to go back, to reinvent the wheel... >> >> you can get an M8... >> >> you don't know what to do with your money ? >> >> ....send your $ to Tina, myself, others... >> >> we are saving up for a second one... >> >> :-) >> >> Steve >> >> >> >> >> >> >> >> >> >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >