Farpoint Adjustable Tri-Bahtinov Mask — 14" to 17" OTAs Universal and serious visual observers pushing

and serious visual observers pushing optics to their theoretical limit

From then on

or Losmandy-style)

It was designed to vastly outperform “bargain brand” filters at only a slight increase in price over those low performance filters

Farpoint Adjustable Tri-Bahtinov Mask — 14" to 17" OTAs Universal and serious visual observers pushingNot 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 14" to 17" 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