BAADER CMOS H-ALPHA F/2 ULTRA-HIGHSPEED FILTER M54 The GIOTTO 220 can be

The GIOTTO 220 can be used with telescopes with an aperture up to 220mm and an external tube diameter between 182 - 244mm with the included plastic thumbscrews

beyond speeding up the alignment procedures

21 Highest practical magnification

it may seem that the encoder system is less important

declination based auto-guide speed correction

BAADER CMOS H-ALPHA F/2 ULTRA-HIGHSPEED FILTER M54 The GIOTTO 220 can beThe new Baader CMOS optimized H alpha 3. 5nm 6. 5nm Highspeed F 2 filter is a precision grade narrowband filter with a high transmission at the H alpha line at 656. 3nm. The Highspeed F 2 versions are specifically designed to work very well with modern highly sensitive astronomy cameras and telescopes with extremely fast focal ratios faster than f 2. 3 such as the Celestron RASA astrographs. The ultra narrow 3. 5nm bandpass makes this ideal for