Bahtinov Focus Masks

The most accurate way of focusing your Telescope for Astrophotography.Focusing your camera on an object is extremely critical and should be done very accurate. a quarter turn on a micro focus focuser of 10:1 will give you the difference of proper focus or out of focus.
We laser cut 3mm ABS black plastic to create the mask. The ABS plastic is almost indestructible.
Any Size is possible.

Please supply us with:
Make:
Model:
Inside diameter of Tube: