SVBONY SV132 Telescope Filter H-Beta Filter 25nm 1.25 inches Eyepiece Filter for Horsehead Nebula California and Cocoon Nebulae in Dark Skies
SKU: B07VLQ8QNL (Updated 2022-02-25)
Price:
US$ 55.99
Description
Features & details
SV132 H-Beta eyepiece filter makes it possible to view the elusive Horsehead, California, and Cocoon Nebulas in dark skies;Great used with a moderate to large aperture telescope and clear dark skies Optical high precision double side polishing; Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces; Avoid halos Precision double-sided optical coatings improve transmission and cut-off depth; Executes with a transmission of over 90% and completely rejects light pollution High value transmission of pass-band and optical density of off-band is assured through planetary rotation system, a homogenous and precise coating procedure; The high optical quality of SV132 filters guarantees no loss in sharpness or contrast Filter with metal mount 1.25' filter threads; Threaded to fit 1.25' eyepieces and threaded diagonal barrels
Manufacturer: SVBONY
Brand: SVBONY
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