SVBONY 1.25'' 2X Barlow Lens+ 1.25" CLS Deep Sky Filters For Astrrophotography

Description

1.25" CLS Deep Sky Filters
The SVBONY City Light Suppression broadband filter is designed to improve the visibility of various Deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area.
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.
Specifications:
Brand: SVBONY
Type: City Light Suppression Filter (CLS Filter)
Material: Optical glass lens, Aluminum Frame
Shape: Round
Barrel diameter: 1.25''
Thread: Standard M28.5*0.6mm
Net Weight: 5.2g / 0.18oz
Package Includes
SVBONY 1.25 inch CLS Filter
Sturdy Plastic Case
Features
:
1.25" 2x Barlow lens fully multi-coated metal with M42x0.75 thread camera connect interface for telescope eyepieces
2X Barlow lens to give a big magnification boost to any 1.25" eyepiece it's used with
The housing is precision machined from aluminum stock and black anodized to a hard finish
The lens edges and inner barrel are blackened to provide maximum contrast
Brand: SVBONY
Item Name: 2x Barlow lens fully multi-coated
Barrel Size: 1.25" (31.7mm)
Magnification Factor: 2X
Lens Material: Pure optical glass lens
Lens Coating: Fully multi-coated
Sleeve Material: Full metal
Thread Interface: M42x0.75
Net Weight: 63g
Total Height: 65mm
Package Includes:
1x Fully Multi-Coated (2X) Barlow Lens
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