Baader Planetarium UHC-L / Ultra-L-Booster-Filter
Key specifications
| Filter type | Light Pollution |
|---|
About
A CMOS-optimized UHC-type light-pollution filter with two wide passbands covering H-alpha, H-beta, O-III and the comet C2 lines, blocking LED and sodium skyglow and UV/IR so it doubles as a luminance filter; successor to the UHC-S. Sold in 1¼", 31 mm, 36 mm, 2", 50.4 mm, 50×50 and 65×65 mm.