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Bahtinov Masks & Telescope Focus Aids

Items 1 - 25 of 74

Farpoint Astro Bahtinov Mask for Celestron 8" SCT - FP410

SKU: FAR-FP410
  • Focus Masks & Caps Known to Fit: Celestron 8" SCT
$26.40

Farpoint Astro Bahtinov Mask for Meade 12" SCT - FP414

SKU: FAR-FP414
  • Focus Masks & Caps Known to Fit: Meade 12" SCT
$39.60

Farpoint Astro Bahtinov Mask for Celestron 9.25" SCT - FP415

SKU: FAR-FP415
  • Focus Masks & Caps Known to Fit: Celestron 9.25" SCT
$27.50

William Optics Bahtinov Mask Cover for WO Z61 Telescopes - Gold - CPBM-61GD

SKU: WYO-CPBM-61-GD
  • Focus Masks & Caps Known to Fit: William Optics Z61 Telescopes
$79.95

William Optics Bahtinov Mask Cover for WO Z61 Telescopes - Red - CPBM-61RD

SKU: WYO-CPBM-61-RD
  • Focus Masks & Caps Known to Fit: William Optics Z61 Telescopes
$79.95

William Optics Bahtinov Mask Cover for WO GT71/Z73/Star71II Telescopes - Blue - CPBM-71BU

SKU: WYO-CPBM-71-BU
  • Focus Masks & Caps Known to Fit: William Optics GT71/Z73/Star71II Telescopes
$88.00

William Optics Bahtinov Mask Cover for WO GT71/Z73/Star71II Telescopes - Red - CPBM-71RD

SKU: WYO-CPBM-71-RD
  • Focus Masks & Caps Known to Fit: William Optics GT71/Z73/Star71II Telescopes
$88.00

William Optics Bahtinov Mask Cover for WO GT71/Z73/Star71II Telescopes - Gold - CPBM-71GD

SKU: WYO-CPBM-71-GD
  • Focus Masks & Caps Known to Fit: William Optics GT71/Z73/Star71II Telescopes
$88.00

William Optics Bahtinov Mask Cover for WO GT81 Telescopes - Blue - CPBM-81BU

SKU: WYO-CPBM-81-BU
  • Focus Masks & Caps Known to Fit: William Optics GT81 Telescopes
$98.00

William Optics Bahtinov Mask Cover for WO GT81 Telescopes - Red - CPBM-81RD

SKU: WYO-CPBM-81-RD
  • Focus Masks & Caps Known to Fit: William Optics GT81 Telescopes
$98.00

William Optics Bahtinov Mask Cover for WO GT81 Telescopes - Gold - CPBM-81GD

SKU: WYO-CPBM-81-GD
  • Focus Masks & Caps Known to Fit: William Optics GT81 Telescopes
$98.00

William Optics Bahtinov Mask Cover for WO 102 & 103 Series Telescopes - Blue - CPBM-102BU

SKU: WYO-CPBM-102-BU
  • Focus Masks & Caps Known to Fit: William Optics 102 & 103 Series Telescopes
$118.00

William Optics Bahtinov Mask Cover for WO GT102 & Z103 Telescopes - Red - CPBM-102RD

SKU: WYO-CPBM-102-RD
  • Focus Masks & Caps Known to Fit: William Optics GT102 & Z103 Telescopes
$118.00

William Optics Bahtinov Mask Cover for WO GT102 & Z103 Telescopes - Gold - CPBM-102GD

SKU: WYO-CPBM-102-GD
  • Focus Masks & Caps Known to Fit: William Optics GT102 & Z103 Series Telescopes
$118.00

William Optics Bahtinov Mask Cover for WO FLT132 Telescopes - Blue - CPBM-132BU

SKU: WYO-CPBM-132-BU
  • Focus Masks & Caps Known to Fit: William Optics FLT132 Telescopes
$178.00

William Optics Bahtinov Mask Cover for WO FLT132 Telescopes - Red - CPBM-132RD

SKU: WYO-CPBM-132-RD
  • Focus Masks & Caps Known to Fit: William Optics FLT132 Telescopes
$178.00

William Optics Bahtinov Mask Cover for WO FLT132 Telescopes - Gold - CPBM-132GD

SKU: WYO-CPBM-132-GD
  • Focus Masks & Caps Known to Fit: William Optics FLT132 Telescopes
$178.00
ZWO 1.25" Helical Focuser

ZWO 1.25" Non-Rotating Helical Focuser - HF125 - Used - SOLD

SKU: UEQ-14690-ZWO-HF125
  • Focuser Design/Type: Helical Focusers
  • Focuser Size - Eyepiece Side: 1.25"
  • Single or Dual Speed Focuser: Single Speed Focuser
$59.00 $47.20
Starlight Instruments Curved Base with Leveling Screws for 2" Feather Touch Focuser
$125.00
AstroZap Aluminum Bahtinov Focus Mask for 139 mm - 216 mm OD Telescopes - Full Aperture

Astrozap Full Aperture Aluminum Bahtinov Focus Mask for 5.5" to 8.5" OD Telescopes - AZ502

SKU: AZP-AZ502
  • Focus Masks & Caps Known to Fit: Telescopes w/ Outside Diameter Between 5.5" & 8.5" (139.7 mm & 215.9 mm)
$39.00

Farpoint Astro Bahtinov Focus Mask for Meade 8" SCT - FP411

SKU: FAR-FP411
  • Focus Masks & Caps Known to Fit: Meade 8" SCT
$26.40
$225.00
Starlight Instruments 2" Focuser Adapter for Celestron 11" and 14" SCT
$90.00
Farpoint Astro Bahtinov Focus Mask for Celestron 9.25" SCT with Hyperstar

Farpoint Astro Bahtinov Focus Mask for Celestron 9.25" SCT w/Hyperstar - FP415H

SKU: FAR-FP415H
  • Focus Masks & Caps Known to Fit: Celestron 9.25" SCT w/ Hyperstar
$27.50
Farpoint Astro Bahtinov Mask for Meade 12" LX850 SCT

Farpoint Astro Bahtinov Focus Mask for Meade 12" LX850 SCT - FP417

SKU: FAR-FP417
  • Focus Masks & Caps Known to Fit: Meade 12" LX850 SCT
$39.60

There is no question how important it is to focus your astronomy system properly. Not only will precise focusing reveal optimal views, but it will ensure the highest image quality possible. Many focusing aids are adapters to connect a focuser to your optical tube assembly. This is particularly helpful if you plan on upgrading your focuser. Focuser adapters maintain your focuser’s stability and reduce strain on your optical tube assembly.


A Bahtinov mask is a must-have for every astrophotographer. This mask attaches to the front of the scope’s objective lens to show the astronomer how to precisely focus their telescope. The Batinov mask consists of three separate grids that produce three angled diffraction spikes when the telescope is pointed at a bright star. As the focus changes, the spikes appear to move so the observer can determine they must increase or decrease focus.


Another interesting focusing tool to consider is a micron indicator kit. These kits give you a readout of your exact focus settings. This great if you’re working with CCD photography, which often requires indexing the exact focus position of your imaging system. A micron indicator kit will often connect to a computer so you can easily use the kit on your computer.

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