Two 5 mm thick aluminium bars are needed on the back, to give more strength on both sides and to close the rear from light, to have the same thickness as the L profiles.
A project log for How to use an aerial 36 inches lens
the different steps involved to shoot with an aerial photographic (enormous) lens when you don't have the airplane to hold it
Two 5 mm thick aluminium bars are needed on the back, to give more strength on both sides and to close the rear from light, to have the same thickness as the L profiles.
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