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Lomography sells the back. There is some modifying needed. I can't give a step-by-step, but if you're handy and have some epoxy, tape, etc. you can do it. Good luck.

http://www.largeformatphotography.info/forum/images/attach/jpg.gifhttp://www.largeformatphotography.info/forum/images/attach/jpg.gif

The Instax Wide back can be used. Since the lens to film...

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It's not as elegant as OeT's green ground glass insert, but it works for me.

Gijsbert- The pack back is meant to be secured with bungies or rubber bands as in your photo. If you shim the back , you'll throw off the focus and be useless for 4x5 film holders. You have rightly...

The Olympus VF-1 finder (for 4/3 format) works also. Use the frame lines for pack film polaroids and the full image for 90mm & 4x5 film.

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I had a 5x7 ground glass cut down to 4 5/8 x 5 5/8 and attached 3/16 x 3/8 wood strips (hobby store). It works for me.

[QUOTE=Drew Bedo;1297162]I am guessing that the 100mm Ektar will focus at infinity if the helical mount is extended; that should be 10mm or most of the way out. Ny guess (again just a supposition)...

I'm using the 'default' 6.8 90mm Angulon. I' like to use a 100mm 6.3 Wide Field Ektar, but the flange to film distance is too long.

While I appreciate all the thoughtful solutions to the ground glass issue, the camera is not meant for critical tripod focus/composition. Once focus calibration has been achieved, the user is free to...

For a simple ground glass solution, get a 4.75 x 5.75 inch ground glass and attach strips of 3/16" foamcore to the edges. This is close to the nominal .190 inch or 5mm distance from film holder to...

Re: a better ground glass. Just get a 4.75x5.75 ground glass and frame the edges with 5mm plastic or heavy cardboard shims.

142503 I crazy glued a cable tie to the spring back to make it easier to insert film holders.