Baader Planetarium Red 610nm Long-Pass Filter, 1.25" Eyepiece

Baader Planetarium Red 610nm Long-Pass Filter, 1.25" Eyepiece
- Freedom from ghost images, even when stacked
- Striae-free substrates are polished parallel to within 30 seconds of arc to avoid wedge errors
- Finest 7-layer hard multi-coatings on both faces feature 0.25% residual reflections
- Extremely high transmission results in maximum contrast and isolation of planetary details, even with smaller telescopes
- Efficiency of the long-pass filter (Red) peaks at 98%
The Baader Planetarium FCFR-1 Red Long-Pass Filter has a bandpass at 610 nm and is designed for 1.25" eyepieces. It has 98% transmission efficiency and enhances planetary details and works well with solar filters. It can be placed anywhere in the optical path without introducing astigmatism or other defects. A fine optical polish and 2 mm thick glass allows these filters to be inserted anywhere into the optical path without introducing astigmatism or other defects.For instance, they can be used in front of a binocular viewer without degrading the image in any way. Substrates are free of striae and plane-parallel polished to within 30 seconds of arc. This eliminates any double images or ghosting due to wedge errors in the glass. The filter cell features the largest clear aperture of any telescope filter on the market for complete freedom from vignetting at any focal length.The front "crown" incorporates milled notches, which makes handling and threading the filter an easy operation in the dark. All surfaces are treated with a 7-layer Multi-Coating, featuring a mere 0.25% residual reflection. It is the most elaborate coating ever applied onto amateur color filters, resulting in a filter free of any false reflections under any incident angle of light.Light is the hottest commodity for all planetary observation. Especially during high magnification work, whether you have enough light or not is the deciding factor for the recognition of the subtlest planeta
Country USA
Brand Baader Planetarium
Manufacturer Baader Planetarium
Binding Camera
ItemPartNumber 4047825009739
Model 2458307
EANs 4047825009739
ReleaseDate 0000-00-00

Country	USA
Brand	Baader Planetarium
Manufacturer	Baader Planetarium
Binding	Camera
ItemPartNumber	4047825009739
Model	2458307
EANs	4047825009739
ReleaseDate	0000-00-00

Baader Planetarium Red 610nm Long-Pass Filter, 1.25" Eyepiece

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