BAADER CMOS O-III F/2 ULTRA-HIGHSPEED FILTER Clearance2024 The upper tube housing is

The upper tube housing is made of birch plywood giving unique strength and stability to the secondary mirror spider

The thumb knobs are positioned above the mounting surface so they do not interfere with the mount and have stainless steel inserts with 5mm hex slots for maximum security

Cooling fans are strategically placed on the backplate and sides of the tube to quickly cool the mirrors to ambient temperature

RS–232 port

The structural fins on the base are engineered to reduce low frequency vibration and avoid resonance effects caused by wind

BAADER CMOS O-III F/2 ULTRA-HIGHSPEED FILTER Clearance2024 The upper tube housing isThe new Baader CMOS optimized O III 4nm 6. 5nm Highspeed F 2 filter is a precision grade narrowband filter with a high transmission at the Oxygen III line at 500. 7nm. 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 4nm bandpass makes this ideal for imaging