I have a Sinar F front standard that after a little repair will work fine as an intermediate standard for long extensions. My plan was to use the regular bellow s and the bag bellows to get the extension I need (want ~1:1 with the 305 lens). It may be a silly question, but is there any rationale for which bellows should go on the front at between the middle standard and the lens and which should go on the rear. My first thought was bag at the front would give greater flexibili ty to tilt the lens. My next thought was that the bag at the rear near the film would reduce any flare caused by internal reflection. Then I thought, heck it ca n't matter.
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