SVBONY Telescope Filter H-Alpha 7nm 1.25 inches Filter Narrowband Astronomical Photographic CCD Filter for Deep Sky

SIZE 1.25 inch

• Optical high precision double sided polishing to ensure that the parallelism is higher than 30 inch and high flatness 1/4 ; to ensure that does not affect the image quality
• Precision double sided optical coating; non two piece glue; effectively improve the transmittance and cut off depth
• Ion source assisted coating technology (IAD), to improve the density of the film to ensure that the filter wavelength to minimize the impact of temperature caused by the temperature drift
• High uniformity planetary wheel coating fixture to improve the uniformity of the filter wavelength
• Optical equipment professional fine sandblasting and anode treatment; the box to do extinction treatment to prevent reflection

• Item Reference: B07HDJN5DN 0602318837257 602318837257