Farpoint Bahtinov Mask for Celestron 8 Classic

SKU: FP410
Farpoint Bahtinov Mask - Celestron 11 SCT (6795775672473)
Farpoint Bahtinov Mask for Celestron 8 Classic

Farpoint Bahtinov Mask for Celestron 8 Classic

SKU: FP410
Regular price $24.00
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Customer Reviews

Based on 3 reviews
33%
(1)
67%
(2)
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B
Bill Wold

Works great!!

M
Martin Kuper
SC8 Mask, delayed delayed

The mask is fine. I ordered it on 2/10 but it was not received until 2nd week in March! I left a couple of VM's and sent at least 2 emails asking for an update.
I received one email in return that was almost insulting. It chided me for calling after hours. NOT GOOD CUSTOMER RELATIONS!

F
Frank Loflin
Excellent performance!

Did EXACTLY as it was supposed to do. Extremely accurate focusing aid. Only problem was after perfect focus was acquired, I had a real problem removing it from my secondary holder on my C-8 Classic. Perhaps it should not snap over the secondary holder completely. Will try that next time.

Farpoint Bahtinov Mask - Celestron 8 Classic (For Pre-2008 C8 Telescopes)

About Bahtinov Masks

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.

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 (Custom fit masks for specific telescopes are also available). Take a short exposure. The image of the star will show diffraction spikes. The “center” spike 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 has been obtained.  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 three major types and in a range of sizes. In addition to Bahtinov masks for telescopes, Farpoint also makes Bahtinov masks for DSLR camera lenses.

Tri-Bahtinov mask can be used for collimation of your telescope.

Star in focus via a Bahtinov mask

 

Software Assist tool

Recently, free software tools have become available to further analyze the images created by the Bahtinov and Tri-Bahtinov mask and provide assistance in adjusting focus and collimation.

 

The Open source software package can be downloaded here: https://github.com/insertnamehere1/Bahtinov-Collimator/blob/master/published/setup.exe



The software is simple to use and works with your existing image capture software.

In addition, Bahtinov mask analysis has been integrated into APT image capture software.

 


 

The diffraction spike pattern from a bright star using a Bahtinov mask

As you adjust the focuser of your telescope, the central spike will move across tthe X-pattern created by the mask.  Adjust the focus of the telescope so the center spike becomes centered and symmetrical with the other diffraction spikes.  This is very intuitive and quick. 

Bahtinov masks work equally well with DSLR cameras.

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