Guide to the BPM Bellows Macro Focusing Rail
The BPM Macro Focusing Rail is an accessory that attaches to the base of the bellows giving more focusing versatility. The rail is used to make larger changes to the position of the bellows set up in relation to the subject. So when using varying degrees of bellows extension you can keep the tripod in a fixed position and just adjust the bellows position using the macro focusing rail.
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