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Farpoint Astro Bahtinov Focus Mask for Celestron 6" SCT - FP409

SKU: FAR-FP409

This item is in stock and typically ships in 1 day or less.

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Our price: $19.00
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FarPoint Bahtinov Focus Mask for Celestron 6" SCT




Bahtinov Focus Masks are the brainchild of Pavel Bahtinov, a Russian amateur telescope maker and astronomer. This indispensable astrophotography tool is constructed from nearly indestructible ABS plastic. It provides an intuitive new way to simplify DSLR, webcam or CCD camera focusing for astrophotography.



Attach your camera to a Celestron 6" SCT and center on a reasonably bright star to achieve rough focus. Then install the mask on the telescope's front aperture and take a short exposure. The image of the star will exhibit diffraction spikes. The "center" set will probably be deviated to one side or the other, demonstrating defocus.



Adjust focus and re-expose the star to show the diffraction spikes again. Repeat this process until you get the central diffraction spike concentrated against the star and the other spikes. When you obtain a symmetrical pattern, you'll know you've obtained the highest possible focus. Take off the mask, center your desired object and take your images!

Description
Description

FarPoint Bahtinov Focus Mask for Celestron 6" SCT


Bahtinov Focus Masks are the brainchild of Pavel Bahtinov, a Russian amateur telescope maker and astronomer. This indispensable astrophotography tool is constructed from nearly indestructible ABS plastic. It provides an intuitive new way to simplify DSLR, webcam or CCD camera focusing for astrophotography.

Attach your camera to a Celestron 6" SCT and center on a reasonably bright star to achieve rough focus. Then install the mask on the telescope's front aperture and take a short exposure. The image of the star will exhibit diffraction spikes. The "center" set will probably be deviated to one side or the other, demonstrating defocus.

Adjust focus and re-expose the star to show the diffraction spikes again. Repeat this process until you get the central diffraction spike concentrated against the star and the other spikes. When you obtain a symmetrical pattern, you'll know you've obtained the highest possible focus. Take off the mask, center your desired object and take your images!

Specifications
Specifications
Model Number FP409
Focus Masks & Caps Known to Fit Celestron 6" SCT
Warranty One (1) Year
What's in the Box?
What's in the Box?
  • Farpoint Bahtinov Mask for Celestron 6" Schmidt-Cassegrain
  • Farpoint Astro Bahtinov Focus Mask for Celestron 6" SCT
  • Farpoint Astro Bahtinov Focus Mask for Celestron 6" SCT - FP409
  • Farpoint Astro Bahtinov Focus Mask for Celestron 6" SCT - FP409
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