Low expansion clear and flat film

Discussion in 'Camera Building, Repairs & Modification' started by Mustafa Umut Sarac, Mar 5, 2011.

  1. Mustafa Umut Sarac

    Mustafa Umut Sarac Member

    Messages:
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    İstanbul
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    35mm RF
    What is the most low expansion clear and ultra flat plastic film for use of making telescope mirror ?

    Best ,

    Umut