BAADER CMOS H-ALPHA 3.5nm F/3 ULTRA-HIGHSPEED FILTER Size:65mmx65mm stainless steel and carbon fiber

stainless steel and carbon fiber

like in a Dobsonian)

this feedback is provided regardless of any zeroing or homing procedure

Dobsonians have the quickest setup time of just about any telescope

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 stainless steel and carbon fiberThe 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