BuckeyeStargazer Duncan Mask for SCT Collimation

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BuckeyeStargazer Duncan Mask for SCT Collimation

£29.00

(1 Review)

✓ 2 year warranty

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About this product

Model: bes_duncan_bahtinov_c925_915_106

BuckeyeStargazer Duncan Mask for SCT Collimation.

A Duncan Mask can be used to easily and quickly collimate your SCT.

Instructions for use:

1. Make sure your scope has cooled to ambient temperature.
2. Point the scope at a bright star that is high in elevation.
3. Place the mask on the scope. Orient the mask such that the three snap-fit connection lines point to the three collimation screws on the Secondary, as shown in the scope image to the left.
4. A camera works best, but you can also use a high-magnification eyepiece. Grossly defocus the star. You should see three arcs that correspond to the three cutouts.

5. As you bring the star closer to focus, the curves will change into lines pointing to a common centre.

6. Use the lines to adjust the collimation screw opposite the line. As you adjust the screw, the line will move toward the centre. The goal is to form a perfect Y where the lines touch in the centre.

The mask comes in three snap-fit sections and can be taken apart for easy storage (C5 and C6 are one piece).

Hyperstar Note: The C6, C8, C9.25, C11, and C14 Duncan Masks accommodate both Hyperstar and native Fastar/secondary mirror configurations. The central hole is sized for the Hyperstar, and the mask includes a snap-fit bushing to decrease the diameter of the Fastar ring. The 'NF' options are for the non-Fastar version of the scope.

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Mask Duncan for sct collimation

22 November 2024 | Claudiu

I am extremely satisfied with the products purchased from First Light Optics. I recommend everyone to purchase quality products from this store, I am also very satisfied with the way they package these products, impeccable packages, but also with the speed in shipping these products. I highly recommend quality products from the First light optics store.