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Baader UHC-S Nebula Filter - L Booster - 50 mm Square Unmounted - FUHC-SQ50

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Baader UHC-S Nebula Filter - L Booster
50 mm Square Unmounted

The Baader UHC-S Nebula Filter and L Booster works well for both visual and photographic applications. This model is 50 mm square and unmounted. The Baader UHC-S filter excels at delivering a high-contrast and natural view of emission nebulae without excessive dimming and loss of background star fields. It's the perfect filter for viewing emission nebulae from light polluted skies, or for boosting the contrast of nebulae from dark sky sites. The advanced technology coatings enable the filter to achieve an outstanding transmission of over 97% across the entire passband, with total blockage of prominent light pollution lines. This translates to maximum image brightness and contrast. Owners of smaller, 4" - 10" telescopes will especially appreciate the high efficiency, and larger scope users will love the rich star fields and detailed subtle nebular shadings that are left intact.

Astrophotographers can also use this filter as an ultra high contrast "L", or Luminance filter, when doing RGB imaging from light polluted areas.

The Baader UHC-S L Booster Filter manages to improve on the contrast of the typical broadband or so-called "Deep Sky" filters. Sky background is darker, and contrast of emission nebulae are noticeably improved. Most other "UHC" filters tend to excessively darken the sky and star fields, leaving the nebulae looking artificial and flat, set against an empty background. The high transmission, sharp cutoffs, and more moderate 60 nm passband of the Baader UHC-S filter retains a more natural view, yet significantly boosts overall contrast. Imagers will appreciate the broader passband and inclusion of an extremely efficient H-Alpha passband (>99% @656 nm), as well as Baader's extreme optical quality.

At the heart of the Baader UHC-S filters are their special fine substrate polishing process and advanced coating design. The result is a filter that imparts no image degradation, unlike other filters. A common misperception is that deep sky viewing is limited to low powers, and image resolution is not as important as in planetary observation. In reality, high magnifications are very common and useful in studying fine details, particularly for the brighter diffuse and planetary nebulae. Baader UHC-S filters can take high magnifications, and stars retain their pinpoint sharpness, even if the filter is used far ahead of the image plane.