Baader Planetarium Contrast Booster Filter for 2" Eyepieces #FCB-2

Description

Baader Planetarium Contrast Booster Filter for 2" Eyepieces
SKU: AA2458365
Mfr. Part: FCB-2
Description
The Baader Planetarium Contrast Booster Filter for 2" eyepiece is much more than a simple minus-violet filter. Based on the popular Baader Moon & Skyglow filter, the Baader Contrast-Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter. Not only does this filter deliver a significant enhancement to planetary and lunar contrasts, but it is designed to also totally eliminate the damaging blue de-focused haze present in achromatic refractors. Gone are the annoying blue halo and obscuring haze that surround and smear resolution and contrast. Subtle contrasts and colors are boosted, while displaying the full resolution your scope is capable of.
The Contrast-Booster combines a special proprietary melt of Neodymium glass with a carefully designed 23-layer dielectric long-pass blocker on one face and a 7-layer ultra-low anti-reflection coating on the other face. By aggressively filtering out the defocused blue wavelengths, a light yellow tint is imparted to objects (noticeably less than a typical yellow filter).
The special coatings enable over 95% transmission across key portions of the visible spectrum (including H-Alpha). This results in a filter that retains the colors and color contrasts in tough subjects like Jupiter, without excessive image dimming. Cloud bands retain their ruddy red hues, but now become more striking in contrast. The Great Red Spot finally becomes easier. Planets and Lunarscapes are set against a jet black sky. The Contrast-Booster is a must for Solar observing when used in conjunction with Baader Astro Solar.
As many users have found, this is a great filter for Mars. The views of Mars with all telescopes (including reflectors and apochromats) benefit from the RGB filtration plus blue blocking. Combined with the Baader UV-IR-Cut Filter, the Contrast-Booster makes the ideal filter set for digital imaging. Rather than add the additional IR filtration (only needed for digital imaging), the Baader Contrast Booster has been optimized for visual use. Digital imagers can simply add Baader UV-IR-Cut Filter when needed. The true 1/4 wave fine optically polished surfaces guarantee the sharpness and contrast of the image.
The base substrate is a special custom melt of Neodymium-doped glass, designed for specific transmission characteristics and made only for Baader Planetarium. In addition to its unique spectral characteristics, the Contrast-Booster offers Baader's hallmark optical and mechanical features that set it apart and result in the best possible image sharpness, contrast and real-world durability.
Features
Eliminates the color error present in economy refractors
Removes the bluish "hue" during lunar, planetary, solar, and terrestrial observation
Strongly emphasizes surface detail on Jupiter and Mars. If you have never seen the GRS (Great Red Spot) on Jupiter - you will with this filter
Over 95% transmission. Provides a bright, brilliant image compared to the usual dark green filters that are used to bring out detail on Jupiter. Color recognition will be retained
The ultimate in lunar filters. The Moon appears much more natural in color (with a slight yellowish tint), compared to the usual low-priced dark green Moon filters usually offered for beginner's telescopes
Completely removes distracting false color and the resulting smeared and washed out image details. You have never ever seen the Moon so tack sharp in an economy-priced telescope
Blocks atmospheric "stray light," also known as skyglow. Sky background turns into pitch black
Fits each and every standard filter thread
Combines with the Baader Infrared Cut-Filter. In this combination all blue scatter as well as unfocused near infrared light is completely removed - an absolute must for digital imaging
Planoptically polished, suitable for being used in front of a binocular viewer, or for afocal image projection during digital imaging (way in front of the focal plane)
No deterioration of resolution with magnifications of 150x and more unlike "raw polished" (flame polished) glass
Specifications
Substrate
Neodymium doped glass
Rear Face Coating
7-layer hard-multicoating
Front Face Coating
23-layer dielectric long pass blocker
Compatibility
2"/5.08 cm eyepieces
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