BAADER CMOS H-ALPHA 3.5nm F/3 ULTRA-HIGHSPEED FILTER Size:65mmx65mm allowing you to clamp every

allowing you to clamp every eyepiece and accessory securely

stainless steel and carbon fiber

The Star Adventurer GTI features a Vixen style dovetail saddle for compatible accessories and optical tube assemblies

The very fast focal ratio allows for the use of very narrow band filters keeping exposure times short

BAADER CMOS H-ALPHA 3.5nm F/3 ULTRA-HIGHSPEED FILTER Size:65mmx65mm allowing you to clamp everyThe new Baader CMOS optimized H alpha 3. 5nm Highspeed F 3 filter is a precision grade narrowband filter with a high transmission at the H alpha line at 656. 3nm. The Highspeed F 3 versions are specifically designed to work very well with modern highly sensitive astronomy cameras and telescopes with extremely fast focal ratios between f 3. 4 and f 2. 3 such as the Sharpstar Hyperbolic Newtonian astrographs. The ultra narrow 3. 5nm bandpass makes this