About this product
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 of planetary and lunar contrasts, but it is designed to also totally eliminate the damaging blue defocused haze present in achromatic refractors. Gone are the annoying blue halo and obscuring haze that surround and smear resolution and contrast. Subtle contrasts and colours 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 antireflection 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 colours and colour 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 (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 cost of additional IR filtration (only needed for digital imaging), the Baader Contrast Booster has been optimised for visual use. Digital imagers can simply add the Baader UV-IR Cut filter when needed. The true 1/4 wave fineoptically polished surfaces guarantee the sharpness and contrast of the image.
Review from Astronomy Technology Today comparing the Baader fringe killer, semi-apo and contrast-booster filters.
|Average Rating (2 Reviews): |
Friday, 9 October 2020 | Nigel
I've only managed one observing session since the Baader Contrast Booster filter arrived so my impression may change in time. But, I'm impressed with this filter. I live in a Bortle 6 area which has recently taken out the sodium street lights and replaced with LED and this filter reduces considerably that white glow glow in the night sky. My targets have shown against a darker sky than normal. When viewing the moon I fancy the maria are more contrasty however the moon was near full at the time so this may change at other phases. So far I'd say it's a worthwhile purchase.
Monday, 24 August 2020 | Joseph
Most useful filter..EVER ..IMHO..
Testing the Baader Contrast Booster on my Apo and 6 sct brings out the Red Spot and Belts ESP FESTOONS clearer than the moon and skyglow..def helps contrast and bad seeing perfect for Mak and SCT uses who dont want too feel they've been robbed of some contrast due to central obstructions ..much better than that cheap green / yellow filter thats not as sharp, plus a much more NATURAL view!
PS:Also works a treat on bright doubles like Rigel helping to mitigate scatter, light flares up the lens and intensity of the Primary star so close faint companions can be seen ..I recommend this and maybe a yellow to help split some others like Antares even ...was marvelous on a mates achro (NO BLUE HAZE) and an ED on Mars..NO RED SPILLOVER That can happen with Mars!.
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