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Farpoint Bahtinov Focus Mask – Celestron 9.25 Classic

|, Farpoint, Telescope Accessories, Focus Masks, Bahtinov Focus Masks|Farpoint Bahtinov Focus Mask – Celestron 9.25 Classic

Farpoint Bahtinov Focus Mask – Celestron 9.25 Classic

$21

7 in stock (can be backordered)

Farpoint Bahtinov Focus Mask – Celestron 9.25 Classic is an ingenious new way to easily focus a telescope.  Pavel Bahtinov, a Russian amateur telescope maker and astronomer, created this simple, very intuitive method and the device has universally been named after him: The Bahtinov Mask.

7 in stock (can be backordered)

Description

Farpoint Bahtinov Focus Mask – Celestron 9.25 Classic

Farpoint Bahtinov Focus Mask – Celestron 9.25 Classic is an ingenious new way to easily focus a telescope.  Pavel Bahtinov, a Russian amateur telescope maker and astronomer, created this simple, very intuitive method and the device has universally been named after him: The Bahtinov Mask.

Adjustable Bahtinov Focus Mask for older “classic” Celestron 9.25″ SCT without Fastar or Hyperstar. Most if not all newer Celestrons have Fastar or they are “Fastar Ready”.

Attach a camera to the telescope, center a fairly bright star and achieve rough focus. Then place the mask over the front aperture of your telescope by “hanging” it on the plastic screws from the front dew shield. Take a short exposure. The image of the star will show diffraction spikes. The “center” set will most likely be shifted to one side or the other. This is showing the defocus.

Adjust the focus of the telescope and re-expose the star, once again showing the diffraction spike pattern. Iterate the process until the central diffraction spike is centered against the star and the other spikes. When a symmetrical pattern is achieved, the best possible focus is then reached.  Simply remove the mask, center the target object and take amazing, sharp images!

Farpoint manufactures this “lifesaving” astrophotography tool out of virtually indestructible ABS plastic, which comes in two major types and in a range of sizes. In addition to Bahtinov masks for telescopes, Farpoint also makes Bahtinov masks for DSLR camera lenses.

Additional information

Weight0.5 lbs

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Package Includes:

  • Bahtinov Focus Mask for Celestron 9.25 Classic