Baader Planetarium 20nm H-alpha Bandpass-Filters (with LPFC) Filter Size:2" 5" R&P Focuser Image Circle:

5" R&P Focuser Image Circle: > Full Frame Recommended Flattener: FLAT 6A III Tube Length: 390mm (Fully Retracted)

0) focal length are perfect for taking in wide swaths of the heavens

The thickness of this adapter is 2mm

Current taxonomic order and up-to-date common names

75 two sizes of adapters

Baader Planetarium 20nm H-alpha Bandpass-Filters (with LPFC) Filter Size:2" 5" R&P Focuser Image Circle:Warning: this filter alone is not suitable for direct viewing of the sun! This 20nm filter replaces the former 35nm H alpha filter, which was developed for interline CCD cameras. Due to advances in sensor technology, now much narrower filters can be used with colour sensors. Compared to the CMOS optimized Baader (Ultra) Narrowband Filters, the 20 nm H alpha filter passes considerably more light. This makes the stars in the image brighter, allowing