Optolong L-Ultimate Dual Band 3nm 2 Inch Filter 93323 A unique filter for many

A unique filter for many different astronomical tasks

you can take advantage of the All Star Polar Alignment procedure

Parabolic (or Paraboloidal) mirrors are a complex shape so need to be well made to provide the high performance expected of them

Tube weight 15kg

The OTA can also be easily separated from the base by unscrewing the tension handles

Optolong L-Ultimate Dual Band 3nm 2 Inch Filter 93323 A unique filter for manyOptolong L Ultimate Dual Band 3nm 2 Inch Filter Optolong L Ultimate Dual Band 3nm 2 Inch Filter 3nm is designed to drastically reduce the effect of light pollution. The 3nm bandwidth means it strongly isolates the nebulae's emissions into H Alpha (red) and OIII (green blue) from anything else. It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and