BAADER METHANE FILTER 889nm 1.25" Astrograph This reduces the f ratio

This reduces the f ratio of the CDK telescope 66%

Medium flat field SKU

Tube diameter 280 mm Tube length 945 mm Tube weight 12 kg SKU TLK25400 Measurements

On the telescope side is a T2 (M42 x 0

Backfocus occupied

BAADER METHANE FILTER 889nm 1.25" Astrograph This reduces the f ratioThe Baader Methane filter is an 8nm narrowband photographic filter designed to isolate the CH4 band at 889nm. This is useful for capturing finer details and contrast on Jupiter and Saturn. As the human eye is not sensitive to light beyond 700nm, this is strictly a photographic filter and benefits from cameras with good NIR response such as the ZWO ASI662MC. The optical surface is fine optically polished so that there is no loss of sharpness at high