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Farpoint FP402 Bahtinov Focus Mask for Telescopes with Dew Shield or Tube Diameter from 5.5-inch to 8.5-inch $16.50 Bahtinov Focus Masks… In 2008 an amateur telescope maker and astronomer ppublished an ingenious new way to easily focus your DSLR, webcam or CCD camera for taking astrophotos. The method is simple, very intuitive and the device has universally been named after the inventor. The Bahtinov Mask. Farpoint manufactures this *LIFESAVING* astrophotography tool out of virtually indestructable ABS pl… |
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