Originally Posted by
Bruce Wehman
In the past, the back panel was made from a solid piece of ¼" phenolic
resin. This is an excellent material from the standpoint of wear and
strength, (the lens boards and front standard are still made from this
material) but a 12x12" piece adds too much weight to the camera. So in
doing some research into materials, I discovered what is referred to as
"Aviation Grade Plywood." In a ¼" thickness, it is 5 ply, strong and
dimensionally stable. But the down side (and the reason it is not used more
often in camera making) is that it doesn't have the cosmetic properties of
phenolic or other hardwoods. So for this reason, the back is painted
black. The result is a much lighter assembly, with no sacrifice in
functionality.
The rear slides were cut down to a narrower profile and some lightening
holes were drilled in the side - all providing lighter weight without any
sacrifice in performance.
And a change that will not be evident in the photos is that the rear base
panel is made from a thicker gage material, meaning a little more weight but
a lot more rigidity.
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