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View Full Version : 9x12 plate to 4x5 film conversion



Jimmy G
10-21-2011, 06:53 AM
Here's my 1930's Voigtlander Bergheil 9x12 plate camera that I converted to 4x5 film. I bought the camera in pretty good condition for about 100 euro, it has a nice Heliar lens so i think the price is pretty good.

I then went about converting it to 4x5 so that i could use it. I build a frame around the original body that would accomodate the 4x5 film holder. The frame was then painted and covered with some vinyl leatherette (getting alot of use out of this stuff!). The nicest part about the camera is the ground glass viewer, i incorporated the original viewer into a milled out 4x5 holder, the beauty of this aside from a perfect fit with the camera is the fact that perfect focus can be acheived as you can use the existing film guides on the film holder as a stop for the frosted side of the ground glass. i.e the frosted side of the ground glass is butt up against this, just as the emulsion side of the film would be.

I've one more thing to do to finish the camera, even though the holder is a nice tight fit with no light leaks I'd to find some kind of off the shelf clamps (one either side) that will secure film holder to the body. Any ideas???

http://farm7.static.flickr.com/6211/6266126378_7dcfc29bb4_b.jpg (http://www.flickr.com/photos/limerick37/6266126378/)
9x12 plate to 4x5 film conversion (http://www.flickr.com/photos/limerick37/6266126378/)

Here's an example with some IR400 infrared film and R72 filter - this one is cropped to 4"x 4".
http://farm4.static.flickr.com/3544/3770565246_210f092869.jpg (http://www.flickr.com/photos/limerick37/3770565246/)
Cratloe IR (http://www.flickr.com/photos/limerick37/3770565246/)

Doug K
10-23-2011, 12:37 PM
That's a great solution! I have 2 Bergheils with Heliars. One is 6.5X9, and the other is 9x12 with green leather. I might consider something like what you've done to be able to use 4x5 film. EFKE and Foma make 9x12 film, but I realize that processing could be a challenge unless you're doing tray or tubes.

jon.oman
10-23-2011, 05:08 PM
I think this is a great solution!

renon
10-25-2011, 05:09 PM
An excellent solution. I have also a few of these old folder plate cameras waiting in a box. The glass lenses of these cameras are great. Your converted camera looks very nice.

colray
10-28-2011, 08:03 PM
I have the same project on the go for my Fotokor.

I'm not sure how good my modification will be ..I have started by making the frame around one of the original film holders.

Re the focus on your project..is the ground glass on the film plane ? or slightly after it?

colray
10-28-2011, 09:26 PM
Stage one of how I'm doing the Fotokor modifacation.

http://img.photobucket.com/albums/v613/ColRay04/001.jpg

Jimmy G
11-01-2011, 04:59 PM
I have the same project on the go for my Fotokor.

I'm not sure how good my modification will be ..I have started by making the frame around one of the original film holders.

Re the focus on your project..is the ground glass on the film plane ? or slightly after it?


Yes the new film plane is behind the original. This just means that the lens does not extend as far to attain a given focus. (I did have to move the distance scale though to account for the new film plane position).

colray
11-03-2011, 01:49 AM
Thanks for the info.

Just finished my Fotokor 5x4 holder and it works great :)