Call Us: 877.623.4021 | Free US Shipping On Orders $25+ (all Astrodon products and some oversize JMI products excluded)

Farpoint Bahtinov Focus Mask – 3.5 Inch to 6.5 Inch Telescopes

|, Farpoint, Telescope Accessories, Focus Masks, Bahtinov Focus Masks|Farpoint Bahtinov Focus Mask – 3.5 Inch to 6.5 Inch Telescopes

Farpoint Bahtinov Focus Mask – 3.5 Inch to 6.5 Inch Telescopes

$17.00

Farpoint Bahtinov Focus Mask – 3.5 Inch to 6.5 Inch Telescopes is an ingenious new way to easily focus a telescope.  Adjustable Bahtinov focus mask for telescopes with dew shield or front end diameter from 3.5″ to 6.5″.

Description

Farpoint Bahtinov Focus Mask – 3.5 Inch to 6.5 Inch Telescopes

Farpoint Bahtinov Focus Mask – 3.5 Inch to 6.5 Inch Telescopes 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 telescopes with dew shield or front end diameter from 3.5″ to 6.5″.

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.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Package Includes:

  • Bahtinov Focus Mask for 3.5″ to 6.5″ Diameter Telescopes

Astrodon products ship worldwide, but this website does not automatically ship other products to all locations. Email weborders@opticalstructures.com for a shipping quote for orders outside the USA and Canada. Items in stock usually ship within one week, but some products take longer and are noted on the product page. Dismiss