SVBNOY H-Alpha 7nm 1.25" Filters Narrowband Astronomical Photographic CCD indoor For Sale
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SVBNOY H-Alpha 7nm 1.25" Filters Narrowband Astronomical Photographic CCD indoor:
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SVBNOY H-Alpha 7nm 1.25" Filter Narrowband Astro deep sky photography CCD Filter
Because H-A is 656nm mainly through the high permeability
of the spectrum, and 656nm spectrum of the color presented by the
red-based, 300-1100nm cut-off depth to get the details of the launch
nebula more richer. Extremely narrow bandwidth allows only the 656nm
band to pass through the filter, can effectively cut off the artificial
light Na lamp and Hg lamp interference to make the transmission line
through, so as to improve the nebula contrast. With CCD is better choice
for deep sky photography and wide-field astrophotography.
high-precision double-sided polishing to ensure that the parallelism is
higher than 30 "and high flatness 1 / 4&lambda, to ensure that does
not affect the image quality of the image.
- Precision double-sided optical coating, non-two-piece glue, effectively improve the transmittance and cut-off depth.
- Electron Gun Evaporation Technology (E-Beam Gun)
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
- Laser engraving LOGO-never fade, fade
- Metal frame, superior aviation aluminum
- High cutoff is effective has been the light damage and other stray light interference
- Using Germany Schott glass, using double-sided polishing processing
- For the emission line 656nm transmittance of 85% or more
- Frame with high-quality aluminum alloy material, anodized extinction treatment
- With SII, H-Alpha, OIII shooting, that SHO Filter, post-synthesis "Hubble"
narrow-band filter, even in areas where light pollution is heavy, and
the full moon (the moon's largest and brightest) is the same, very
narrow bandwidth, which reduces the interference of the external
environment, but the haze and cloudy The weather is not possible.
- Carton PP environmentally friendly materials, simple and beautiful
- Lined with double-layer EVA damping cotton
- Precision CNC integrated molding
- Multi-layers anti-reflection coating
- Thread: M28.5*0.6Package Includes:
- SVBONY H-Alpha 7nm 1.25" Filter
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Because H-Alpha is 656nm mainly through the high permeability of the spectrum, and 656nm spectrum of the color presented by the red-based, 300-1100nm cut-off depth to get the details of the launch nebula richer. Extremely narrow bandwidth allows only the 656nm band to pass through the filter, can effectively cut off the artificial light Na lamp and Hg lamp interference to make the transmission line through, so as to improve the nebula contrast. With CCD is better choice for deep sky photography and wide-field astrophotography.On Mar-25-20 at 18:25:16 PDT, seller added the following information:
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