8x20 to 12x20

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CraigK

Member
Joined
Aug 20, 2003
Messages
262
Location
Canada
Hi All,


I am currently restoring an 8x20 banquet camera. I have taken it apart (photographing each step of the way so I know how to put it back together!) and have stripped the finish from the wood. A friend of mine, an excellent woodworker is doing some minor repairs to certain areas. His work has been so good that I have asked him to actually replicate each piece of the camera in mahogany. I have another friend who is a metal smith. He has agreed to replicate the brass parts (I will purchase bellows and gears etc. on line).

When all is said and done I will have sufficient parts/pieces to make two cameras, the refinished original as well as a brand new one. However the thought occured to me that I can simply scale the back of the replica camera up to 12x20 from 8x20. That way I would have a choice in formats.

My question is this:

How do I caluclate the amount of extra width I need on the back. The image size of the 8x20 is not exactly 8x20 (something like 7 5/8 x20) and the slot for the film holder obviously has its own measurements to accept an 8x20 holder. It seems to me that I really need an extra 4 inches of width, n'est-ce pas? Or is it a bit more complicated than that?

Would anyone on the board be so kind as to measure their 12x20 back for me so I may make one like it for my camera? I would need all the appropriate measurements including inside and outside dimensions, film holder size etc. I can then compare them to the 8x20 back to see where I need to add the extra room.

Thanks,

Craig K.
 

Donald Miller

Member
Joined
Dec 21, 2002
Messages
6,233
Shooter
Large Format
Craig,

The overall dimensions on my 12X20 Korona measure 16 3/4 X 23 inches. The film holder measures 14 X 22 5/8 inches. This is the film holder proper without including the darkslide handle. Hope this helps...good luck
 

livemoa

Member
Joined
Aug 12, 2003
Messages
434
Location
Was New Zeal
Shooter
Multi Format
An option would be to buy a 12x20 holder and then use that as template to scale the back up from. That way you would have the exact measurements of the holder and can ensure that the back would fit and be light tight.

David
 

lee

Member
Joined
Nov 23, 2002
Messages
2,912
Location
Fort Worth T
Shooter
8x10 Format
livemoa said:
An option would be to buy a 12x20 holder and then use that as template to scale the back up from. That way you would have the exact measurements of the holder and can ensure that the back would fit and be light tight.

David

that is what I would do.

lee\c
 

Jorge

Member
Joined
Sep 6, 2002
Messages
4,515
Shooter
Large Format
The Schneider 210 XL covers with some movement. Of course I think you have to mortgage your house to buy one.
 
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