Bahtinov Focus Masks...
• In 2008 an amateur telescope maker and astronomer published an ingenious new way to easily focus your DSLR, webcam or CCD camera for taking astrophotos. The method is simple, very intuitive and the device has universally been named after the inventor. The Bahtinov Mask.
• Farpoint manufactures this *LIFESAVING* astrophotography tool out of virtually indestructable ABS plastic and comes in two major types and in a range of sizes.
• One mask is a general purpose mask designed to fit refractors and newtonian telescope. The other mask is designed to fit Schmidt Cassegrain telescopes. Both types of mask are available in a range of sizes to cover your needs.
Reviewed by 2 customers
I use this to focus my guidescopes. To get the best guiding performance, one needs to defocus the scope slightly to wash out star twinkle to reduce unnecessary guiding corrections. This mask allows you to precisely adjust your scope for maximum guiding efficiency.
This focus mask makes focusing really easy. Using Live view on my DSLR makes for super fast focusing. This mask is easy-on, easy-off. Just have to remember to take it off for the real pictures.