Go Back   Rangefinderforum.com > Non Rangefinder Cameras > Lomo / Diana / Holga / Pinhole / Polaroids

Lomo / Diana / Holga / Pinhole / Polaroids Dedicated to Lomo / Diana, Holga, Pinhole, and Polaroid photography. Not recommended for those endlessly obsessing over the sharpest lens.

Thread Tools Display Modes

Old 06-05-2006   #76
Lord of Broken Toys
bmattock's Avatar
bmattock is offline
Join Date: Jul 2003
Location: Detroit Area
Posts: 10,027
Welcome to the dark slide, er side! I am way behind, my work waits for me. But I must sell all my other cameras first. Slow slogging. Anybody want to buy a Petri Racer?

Best Regards,

Bill Mattocks
Immanentizing the eschaton since 1987.
  Reply With Quote

modification for lens of different focal length
Old 06-06-2006   #77
home on the rangefinder
2maneekameras's Avatar
2maneekameras is offline
Join Date: Jan 2005
Location: An island in puget sound surrounded by photo ops
Posts: 144
modification for lens of different focal length

This seems like a good time to display a way to modify the focusing linkage for those who want to use a replacement lens of a different focal length than the original one. The camera on the left has the bellows extension linkage in the original configuration. The camera on the right has been modified for use with a lens of a shorter focal length. Both cameras are set to infinity. Modifications to the camera on the right: The lensboard was removed from the struts and material was removed from the top to allow mounting of a better lens and shutter. A pc flash connector was also added to the lensboard at this time and later electrically connected the the flash contacts of the shutter. The new lens had a focal length of 90mm as opposed to 114mm. With the orginal set up, the bellows would not retract enough to focus at infinity with the new lens. The struts were shortened by removing material at the outboard end. The pivot point was also changed on the lens board. I temporarily installed a groundglass at the film plane and the lens was focused at infinity with the struts diconnected from the lensboard. New holes were drilled in the lensboard and modified strut ends, to retain the assembly at this position. The focus scale was then recalibrated for this modified linkage. A viewfinder off a Polaroid J66 was installed and oriented to match the groundglass image.
Attached Images
File Type: jpg bellows_top.JPG (54.3 KB, 59 views)
File Type: jpg bellows_bottom.JPG (52.9 KB, 56 views)
avatar cameras: eyes=2xzorki 4a, zorki 1b, leotax. nose=leicaIIIa,M3. mouth=fed 1a,2d,3a,3b.

<a href='http://www.rangefinderforum.com/photopost/showgallery.php?cat=500&ppuser=1007'>My Gallery</a>

Last edited by 2maneekameras : 06-06-2006 at 08:17.
  Reply With Quote

Old 06-06-2006   #78
Lord of Broken Toys
bmattock's Avatar
bmattock is offline
Join Date: Jul 2003
Location: Detroit Area
Posts: 10,027
That is some really intricate and detailed work! I'm in awe, I doubt my attempt will much more than a hatchet-job - I'll be lucky if it doesn't leak light. But I'm inspired by watching it.

Best Regards,

Bill Mattocks
Immanentizing the eschaton since 1987.
  Reply With Quote

Old 06-08-2006   #79
remrf's Avatar
remrf is offline
Join Date: Nov 2005
Location: Tucson, Az.
Posts: 345

One of the machine shop programs running right now where I work is producing "scrap" aluminum plates that are 1/4"x6.25"x7.25". When I saw them it occurred to me that they were about right for the outside dimensions of the adapter plate I would need to make to mount the Omega film back/groundglass assembly to the camera body. And it would be free. They have a 3/4" hole near the center of the plate but that section would be milled away anyway.

But it ain't gonna' work. I just measured the Omega back and although I could make a plate that would just slip inside the back for a light seal there would not be enough material to make the sliding lock mounting system I want to use on the project. I want to leave the Omega back free to use with both cameras so the mount system has to be non permanent.


I don't have the 250 yet so I don't know if the surfaces that are left after cutting away the back are sturdy enough to mount a locking system on them instead. Or if that is even possible.

Come on U.S.P.S.
Leica IIIa w/Summar 50mm f-2, Zorki 2c w/Industar 22 and 61 50mm, Yashica Electro 35 GS, Minolta x-700(2)w/28,50, 28-85,28-200mm, Minolta 7000 w/28-200mm lens, Mamiya C-3w/105 and 180mm, Rolleicord 1V w/80mm f-3.5 Zenar, Mamiya 645 w/ Mamiya f-4 210mm, f-3.5 150mm,f-2.8 55mm,Vega f-2.8 90mm, Mamiya f-2.8 80mm, Omega View cameras(2, "E" and "D") Schneider Zenar f-6.1 210 mm and Super Angulon f-8 90 mm, Graflex Crown Graffic w/ Optar f-4.5 150 mm, Minolta Z-1 Digital.

  Reply With Quote

Old 03-21-2011   #80
Registered User
pixelatedscraps's Avatar
pixelatedscraps is offline
Join Date: Mar 2010
Age: 34
Posts: 346
Is anyone still working on their Polaroid 4x5 conversions? I've only just recently dipped my curious toes into the LF world and went from looking up a Toyo 45CF (shudder) to playing with a Crown Graphic and then to finding out about a certain Mr. Littman and his circus, to now coming back here and finding there are users making their own Polaroid 4x5 conversions.

Needless to say, I'm looking to buy one. I am a street / portrait shooter with not much need for architectural / landscape tilt/shift/swing movements so one of these would be perfect for me. Any options other than Razzle or Eastcamtechs?

Leica M4 | 35mm f2.8 Summaron
Mamiya 6 | 50mm f/4
Kodak Retina IIc | 50mm f2 Xenon
Olympus XA4
Nikon FTN & FE2 | 20mm f4 AI | 35mm f2.8 AI'd | 50mm f1.4 AI'd

Zeiss 21mm f/2.8 ZF.2 | Sigma 35mm f/1.4 | Nikon 50mm f/1.8G | Micro-Nikkor 60mm f2.8G | Nikon 85mm f1.8G | Voigtlander 90mm f/3.5 SLII APO-Lanthar
Nikon D800E | D600

  Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Any Rolleiflex TLR users here? Rob TLR Forum - Twin Lens Reflex 294 02-03-2008 07:40
Argh! Photo Processing Frustration bmattock Rangefinder Photography Discussion 32 05-15-2006 06:25
Forsaking all film for digital bmattock Rangefinder Photography Discussion 59 01-24-2006 13:13
Film, Processing, and Scanners bmattock Rangefinder Photography Discussion 26 12-06-2005 19:48
My 1st roll of film w/. R2 & Heliar 15mm Designer Cosina Voigtlander Bessa 18 08-17-2004 06:21

All times are GMT -8. The time now is 22:23.

vBulletin skin developed by: eXtremepixels
Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.

All content on this site is Copyright Protected and owned by its respective owner. You may link to content on this site but you may not reproduce any of it in whole or part without written consent from its owner.