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  • FarPoint Farpoint Astro Bahtinov Mask for Celestron 8" SCT - FP410
    $20.00
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  • FarPoint Farpoint Astro Bahtinov Mask for Meade 12" SCT - FP414
    $30.00
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  • FarPoint Farpoint Astro Bahtinov Mask for Celestron 9.25" SCT - FP415
    $21.00
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  • Stellarvue 3
    Stellarvue Stellarvue 2" Visual Back for SVQ100 with 3" FT Focuser - DCQFT3
    $49.00
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  • Farpoint Bahtinov Focuse Mask for 58 mm DSLR Camera Filter Threads
    FarPoint Farpoint Bahtinov Focus Mask for 58 mm DSLR Camera Filter Threads - FP439
    $13.00
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  • Stellarvue 3
    Stellarvue Stellarvue 2" Visual Back for SVQ100 with 3" SV Focuser - DCQSV3
    $49.00
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  • AstroZap Aluminum Bahtinov Focus Mask for 139 mm - 216 mm OD Telescopes - Full Aperture
    Astrozap Astrozap Full Aperture Aluminum Bahtinov Focus Mask for 5.5" to 8.5" OD Telescopes - AZ502
    $28.00
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  • FarPoint Farpoint Astro Bahtinov Focus Mask for Meade 8" SCT - FP411
    $20.00
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  • Starlight Instruments Starlight Instruments 3" Adapter for Explore Scientific EDT 102CF w/Sliding Dew Shield - A30-1903-ES102CF
    $225.00
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  • Starlight Instruments 2
    Starlight Instruments Starlight Instruments 2" Focuser Adapter for Celestron C11 & C14 SCT Telescopes - A20-212
    $90.00
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  • Farpoint Astro Bahtinov Focus Mask for Celestron 6
    FarPoint Farpoint Astro Bahtinov Focus Mask for Celestron 6" SCT - FP409
    $19.00
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  • Farpoint Astro Bahtinov Focus Mask for Celestron 8
    FarPoint Farpoint Astro Bahtinov Focus Mask for Celestron 8" SCT w/Hyperstar - FP410H
    $20.00
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  • Farpoint Astro Bahtinov Focus Mask for Celestron 11
    FarPoint Farpoint Astro Bahtinov Focus Mask for Celestron 11" SCT - FP412
    $25.00
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  • Farpoint Astro Bahtinov Focus Mask for Celestron 11
    FarPoint Farpoint Astro Bahtinov Focus Mask for Celestron 11" SCT w/Hyperstar - FP412H
    $25.00
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  • Farpoint Astro Bahtinov Mask for Meade 10
    FarPoint Farpoint Astro Bahtinov Focus Mask for Meade 10" SCT - FP413
    $25.00
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  • Farpoint Astro Bahtinov Focus Mask for Celestron 9.25
    FarPoint Farpoint Astro Bahtinov Focus Mask for Celestron 9.25" SCT w/Hyperstar - FP415H
    $21.00
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  • Farpoint Astro Bahtinov Mask for Meade 12
    FarPoint Farpoint Astro Bahtinov Focus Mask for Meade 12" LX850 SCT - FP417
    $30.00
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  • Farpoint Astro Bahtinov Focus Mask for Celestron 14
    FarPoint Farpoint Astro Bahtinov Focus Mask for Celestron 14" SCT w/Hyperstar - FP418H
    $40.00
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  • Farpoint Bahtinov Mask for 3.5
    FarPoint Farpoint Bahtinov Mask for Refractors or Newtonians with 3.5" to 6.5" Front Diameter - FP401
    $17.00
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  • AstroZap Bahtinov Focusing Mask for 8.5
    Astrozap AstroZap Full Aperture Aluminum Bahtinov Focus Mask for 8.5" - 11.5" OD Telescopes - AZ503
    $44.00
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  • AstroZap Bahtinov Full Aperture Focusing Screen for 14.5
    Astrozap AstroZap Full Aperture Aluminum Bahtinov Focus Mask for 14.5" - 17.5" OD Telescopes - AZ505
    $72.00
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  • AstroZap Bahtinov Focusing Screen for 2.5
    Astrozap AstroZap Full Aperture Aluminum Bahtinov Focus Mask for 2.5" - 5.5" OD Telescopes - AZ501
    $24.00
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  • Astrozap Full Aperture Bahtinov Focusing Mask for 11.5
    Astrozap AstroZap Full Aperture Aluminum Bahtinov Focus Mask for 11.5" - 14.5" OD Telescopes - AZ504
    $68.00
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  • Orion PinPoint Telescope Focus Mask - 58 mm to 93 mm ID
    Orion Orion 58 - 93 mm ID PinPoint Telescope Focusing Mask - 40004
    $15.99 $14.39
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  • Orion 78 mm to 113 mm ID PinPoint Telescope Focus Mask
    Orion Orion 78 - 113 mm ID PinPoint Telescope Focusing Mask - 40005
    $17.99 $16.19
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  • Orion PinPoint Telescope Focusing Mask - 98 - 133 mm ID
    Orion Orion 98 - 133 mm ID PinPoint Telescope Focusing Mask - 40006
    $18.99 $17.09
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  • Orion PinPoint Telescope Focus Mask for 118 - 153 mm Outside Diameter Telescopes
    Orion Orion 118 - 153 mm ID PinPoint Telescope Focusing Mask - 40007
    $19.99 $17.99
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  • Orion 138 mm to 173 mm ID PinPoint Telescope Focus Mask
    Orion Orion 138 - 173 mm ID PinPoint Telescope Focusing Mask - 40008
    $22.99 $20.69
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  • Orion PinPoint Telescope Focusing Mask for 158 mm - 193 mm OD Telescopes
    Orion Orion 158 - 193 mm ID PinPoint Telescope Focusing Mask - 40009
    $24.99 $22.49
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  • Orion 228 mm to 263 mm ID PinPoint Telescope Focusing Mask
    Orion Orion 228 - 263 mm ID PinPoint Telescope Focusing Mask - 40012
    $34.99 $31.49
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  • Orion PinPoint Telescope Focus Mask for 268 - 303 mm Outside Diameter Telescopes
    Orion Orion 268 - 303 mm ID PinPoint Telescope Focusing Mask - 40013
    $39.99 $35.99
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  • Astrozap Focusing Cap for 11
    Astrozap AstroZap Focusing Cap for 10" SCT's - AZ410
    $62.00
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  • Farpoint Astro Larger Bahtinov Mask for Telescopes and Dew Shields w/8.5
    FarPoint Farpoint Bahtinov Mask for 8.5" to 10.5" Diameter Telescopes - FP404
    $23.00
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  • Explore Scientific Extension Tube for Rack & Pinion Focuser - 1
    Explore Scientific Explore Scientific 1" Extension Tube for Rack & Pinion Focuser - ESRPEXT1
    $22.99
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  • Explore Scientific Extension Tube for Rack & Pinion Focuser - 2
    Explore Scientific Explore Scientific 2" Extension Tube for Rack & Pinion Focuser - ESRPEXT2
    $26.99
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  • Explore Scientific T-Mount DSLR to 2
    Explore Scientific Explore Scientific T2 Mount DSLR to 2" Focuser Adapter - 510365
    $39.99
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  • Stellarvue Low Profile Visual Back for SVQ100-3FT Astrograph
    Stellarvue Stellarvue Low Profile 2" Visual Back for Current SVQ100 with 3" Feather Touch Focuser - DCQFT3R
    $49.00
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  • William Optics Diffraction Spikes Bahtinov Mask with Box
    William Optics William Optics Diffraction Spikes Bahtinov Mask for 105mm-148mm Dew Shields - BM-DS-GR55
    $48.00
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  • William Optics Diffraction Spikes Bahtinov Mask
    William Optics William Optics Diffraction Spikes Bahtinov Mask for 75mm-110mm Dew Shields - BM-DS-GR45
    $43.00
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  • William Optics Diffraction Spikes Bahtinov Mask
    William Optics William Optics Diffraction Spikes Bahtinov Mask for 172mm-235mm Dew Shields - BM-DS-GR90
    $68.00
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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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