Nightsky 120mm Bahtinov Focusing Metal Mask

40110015

New product

  • NightSky Bahtinov Focusing Mask for Telescopes front end diameter 120mm to get more Precise and Faster Focusing
  • All Metal Construction – Anodizing Aluminium Process
  • The Bahtinov Mask made from Metal, maybe not plastic and has now entire anodizing aluminium procedure. 

    How to use it?

      1.Place the Bahtinov Focus-Mask over the end of your telescope, then locate a bright star near your target, take a 3-5 second picture and view the diffraction spikes.

      2. Change your focus, take another picture and again, view your diffraction spikes. Is the center spike moving further from center?

      3. Then change the direction your focusing and try another picture. Watch the direction the spikes are moving and when the center spike passes the middle of the other two spikes, change direction and fine tune your tuning knobs until the center spike is in the middle. Your now in perfect focus.

Card Code8001510938

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Nightsky 120mm Bahtinov Focusing Metal Mask

Nightsky 120mm Bahtinov Focusing Metal Mask

  • NightSky Bahtinov Focusing Mask for Telescopes front end diameter 120mm to get more Precise and Faster Focusing
  • All Metal Construction – Anodizing Aluminium Process
  • The Bahtinov Mask made from Metal, maybe not plastic and has now entire anodizing aluminium procedure. 

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