SV132 H-Beta 25nm 1.25'' Filter - Light Pollution Reduction

SV132 H-Beta 25nm 1.25 inch filter to reduce light pollution

• Designed for observing the Horsehead, California, and Cocoon nebulae with a moderate to large aperture telescope in dark skies.
• High precision optical polishing on both sides; the filter substrate is polished to 1/4 wave and <30 parallelism on both surfaces, preventing halos.

High precision optical coatings improve transmission and cutoff depth; they offer over 90% transmission and completely reject stray light.

The high transmission of the bandwidth and the optical density of the stop band are ensured by the planetary rotation system, a homogeneous and precise coating process; The high optical quality of the SV132 filters guarantees no loss of sharpness or contrast.

• Filter with 1.25 inch threaded metal mount; Threaded to fit 1.25 inch eyepieces and threaded diagonal barrels.