Electron beam gun evaporation with Ion assisted deposition coating technology for durability and resistance to scratching;as well as stability on CWL (central wavelength) no deviation affected by temperature change
Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off band
90% transmission of main nebula emission lines;such as Ha 656nm;OIII 496nm;500nm;SII672nm and H-beta 486nm
0.1% transmission of off-band;specifically the major emission lines of artificial light pollution;such as Na 589nm;Hg 435nm and 578nm
Suitable for color CCD cameras and unmodified DSLR Urban optical filter can effectively suppress urban harmful light and improve the contrast of shooting target
SVBONY SV137 Barlow Lens 1.25 Inch 2X Barlow Lens Metal Body Fully Multi Coated Telescope Accessory for Standard Telescope Eyepiece Astronomy
KWD 7.500
-10%
SVBONY SV216 2X Barlow Lens, 1.25inch FMC 4-Elements APO Apochromatic Barlow, Double Magnification Telescope Accessories for Planetary Visual and Photography
KWD 36
SVBONY SV192 Dew Heater Strip 480 mm Lens Heater Warmer for Telescope DSLR Camera Lens Outer Diameter Below 152mm
KWD 11
SVBONY SV105 Telescope Camera CMOS Electronic Digital Eyepiece for Telescope 1.25 inches Lunar Planetary Astronomy Camera for Beginners
KWD 25
