Filter 2 Inc CLS Deep Sky for Astronomy Telescope Eyepiece Cut Light Pollution

Description

Filter 2 Inc CLS Deep Sky for Astronomy Telescope Eyepiece Cut Light Pollution
Features:
■Multi-layers anti-reflection coating
■Non-cementing optical substrate coating
■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.
■Ultra-thin filter cell minimize vignetting by maximize possible
Aerometal Material Precise CNC Machining Sand Blasting
Process Black Anodized Finish Extinction Treatment to
Prevent Reflection Laser Engraving No Fading
90% transmission of main nebula emission lines (i.e. 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 (i.e. Na 589nm, Hg 435nmand 578nm).
■Suitable for color CCD cameras and unmodified DSLRs
■CLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution.
■Light pollution filter do not eliminate the effects of light pollution or increase the object ' s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.
▲WARNING:
The filters of SVBONY are not designed for sun observation. DO NOT LOOK AT THE SUN WITH SVBONY FILTER. You would be BLIND if you fail to observe the warning.
▲Kind note:
About Color:
Light, computer display and other reasons, pictures and objects may slightly chromatic aberratio (color fifference), please refer to the material item
About Coating:
Interferential filter to change surface color depending upon light and movement. Please in kind prevail.
About Product Object:
All of specifications change in order to  improve product quality. We ask your understand if any update informations publish delay.
About Product Overview:
Please note that this series of filter as same as specifications, processing technic, test methods. It is only size difference
Package Detail:
1 X 2" Svbony CLS Telescope Filter