Farpoint Adjustable Tri-Bahtinov Mask — 13" to 16" OTAs solar-filter 1/10 wave or better

1/10 wave or better

The result is smooth and positive azimuth movement and much greater stability

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The Farpoint SSF-275 Solar Filter is designed for telescopes with 270–275 mm tube outer diameter

Farpoint Adjustable Tri-Bahtinov Mask — 13" to 16" OTAs solar-filter 1/10 wave or betterNot sure this is the right mask for your telescope? Use our Focus Mask Finder match your scope to the right Standard, Tri Bahtinov, or Hyperstar RASA mask. Adjustable Tri Bahtinov focus and collimation mask for OTAs from 13" to 16" front aperture. Sets onto the front of your telescope, gives you focus AND a collimation check from a single short exposure, and lifts off cleanly when you're done. The adjustable peg system fits any scope in this aperture