TRI-Bahtinov Focus Mask - Meade SCT Adjustable EQ head position to

Adjustable EQ head position to optimize center of gravity over the tripod and fully utilize the increased 3°-65° latitude range

1 Field Stop (mm) 22

35 kg (3 lb) counterweight is designed for SkyTracker Pro and SkyGuider pro counterweight package (#3324)

Even density with any aperture that keeps a flat surface as compared to other thin-film filters that have wrinkles and creases

TRI-Bahtinov Focus Mask - Meade SCT Adjustable EQ head position toWhat is the Tri Bahtinov? Essentially three Bahtinov masks in one, rotated over 120 degrees. It gives you three lines and three crosses to check focus and collimation, along three axis simultaneously. In addition to focusing, the tri Bahtinov so also indicates collimation status along three axis. This is interesting for e. g. Schmidt Cassegrain telescopes, where the collimation is done by push pull screws of the secondary mirror along three axis. When