Pentax 67/6x7 Vacuum Back Use Instructions


 

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The modified Pentax 67 or 6x7 may be used normally (i.e. without vacuum applied) with 220 film. 120 film may also be used, but the paper backing must be removed as detailed on the Hutech page Converting 120 Film for Astro Camera Use". In either case set the film length indicator (indicated by an arrow at right) for the appropriate roll type, but do not attempt to change the film pressure plate setting inside the cover.

When using vacuum hold, the only operational difference is to remember to remove the vacuum prior to advancing the film, and to apply the vacuum before starting an exposure.


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