Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 2" #

Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 2" # FCFY-2 2458311
- 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 (Yellow) peaks at 98%
The Baader Planetarium FCFY-2 Yellow Long-Pass Filter has a bandpass at 495 nm and is designed for 2" eyepieces. It has 98% transmission efficiency and is superb for bright planet and cometary details. It can be placed anywhere in the optical path without introducing astigmatism or other defects. Baader Planetarium astronomy filters by far supersede the mediocre quality of common "flame polished" color filters. 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 wo

Country	USA
Binding	Camera
Brand	Baader Planetarium
EAN	4047825009715
Label	Baader Planetarium
Manufacturer	Baader Planetarium
Model	2458311
MPN	4047825009715
PartNumber	4047825009715
Publisher	Baader Planetarium
Studio	Baader Planetarium
ReleaseDate	0000-00-00

Baader Premium Eyepiece Filter: Yellow, 495nm Longpass - 2" # FCFY-2 2458311

You might also like...