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"Baader Planetarium Yellow 495nm Long-Pass Filter, 2"" Eyepiece"

$6400
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Product Description

Description:

"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|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%|Carefully designed spectral characteristics. Filters may be stacked without image degradation or ghosting, in order to provide even narrower passbands, or combine with any of the other Baader filters for interesting possibilities|No reduction in sharpness, even at high magnifications or when using the filter far ahead of the focal plane|With the 2"" size, only one filter is needed for binoviewing. Only Baader colored filters have the optical quality necessary for use this far ahead of the focal plane"

Specifications

BrandBaader Planetarium
ManufacturerBaader Planetarium
MPNFCFY-2
Base SKUAA2458311
EAN4047825009715



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Return Policy:
  • For the first 14 days of your purchase you may return the merchandise for a full money back refund, excluding any shipping charges
  • No RMA number is required to return an item, simply download and fill out the Return Merchandise form 
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  • Returned or exchanged products must be in brand-new, mint condition, and have all original manufacturers packaging, materials and accessories, including instruction booklets, packing inserts, and blank warranty cards.
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  • The original manufacturer's labeled packaging should be enclosed within an outer shipping box. Please do not write or place shipping labels or stickers on the manufacturer's packaging
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  • Ship the parcel back to us freight prepaid. We do not accept COD or freight collect shipments. We recommend a shipping method that provides tracking and insurance.
  • Ship to:
    Order Processing
    7 Slater Drive
    Elizabeth, NJ 07206.
  • Items that qualified for free shipping that are being returned will have our standard shipping charges deducted from refund or credit. The return shipping cost (the cost to send an item back to us) is not refundable.
  • Please allow up to 8 business days after we receive the package for your return/exchange/refund to be processed. An email confirmation will be sent to you once the return is processed.
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