BAADER CMOS H-ALPHA 3.5nm F/3 ULTRA-HIGHSPEED FILTER Size:65mmx65mm The very fast focal ratio

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

like in a Dobsonian)

this feedback is provided regardless of any zeroing or homing procedure

Eyepiece LET 28

stainless steel and carbon fiber

BAADER CMOS H-ALPHA 3.5nm F/3 ULTRA-HIGHSPEED FILTER Size:65mmx65mm The very fast focal ratioThe 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