See Extended Information for Full Description

Alternative Views:

Superb Refractor Filter
List Price: $136.00
Our Price: $92.99
Savings: $43.01
Glasses Compatible? n/a
Eye Relief: n/a
Diameter: 1.25"
Apparent Field n/a
Product Weight: 7g

Quantity in Stock:10
Availability:: Usually Ships in 24 Hours
Product Code: 1501000

Description Technical Specs Extended Information
Baader Contrast Booster Filter 1.25"
A unique filter for many different astronomical tasks – incomparable in acuity. A strong minus-violet filter for achromats, and an EXCELLENT PLANETARY FILTER.
  • Eliminates the color error of economy
  • Refractors

  • Clearly puts the real quality of the lens on display

  • Removes the bluish „hue“ (= lack of
  • contrast) 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 –
  • with this filter you will!

  • Over 95% transmission – provides a
  • bright, brilliant image compared to the
  • usual dark green color filters, used to
  • bring out detail on Jupiter.
  • Color recognition will be retained!

  • The ultimate in lunar filters! Moon
  • (and Sun!) appear much more natural in
  • color (with a slight yellowish tint),
  • compared to the usual low priced dark
  • green Moon-filters, usually offered for
  • beginners telescopes.

  • Completely removes distracting false
  • color and the resulting smeared
  • and washed out image details. You have
  • never ever seen the Moon or the Sun
  • (with AstroSolar Safety Film) so tack
  • sharp in an economy priced telescope!

  • Blocks atmospheric „stray light“ (skyglow).
  • Sky-background turns into pitch black!

  • Fits each and every standard filter thread;

  • Combines with the (planeoptically
  • polished) 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!

  • Planeoptically 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 200 x and more – as with „raw polished“
  • (flame polished) glass!

  • Substrate (glass melt)
  • Neodymium doped glass

  • Coating /rear face: 7-layer
  • hard-multicoating,
  • featuring 0,25% reflection

  • Coating/front face: 23-layer
  • dielectric long pass blocker

  • Ionbeam hardened coatings
  • on both faces, absolutely
  • scratch resistant – may be cleaned
  • any time without fear

  • A significant part of City Light
  • Air Pollution, as well as Atmospheric
  • Airglow is removed from the
  • telescopic image.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 9 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 Lives up to its reputation December 8, 2021
Reviewer: Rene from Ithaca, NY United States  
Very happy with enhanced viewing of Jupiter using this filter; my best views to date. I’m looking forward to using it for lunar viewing.

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  0 of 0 people found the following review helpful:
5 of 5 Filter November 29, 2021
Reviewer: Gary Ashurst from Los Ranchos, NM United States  
Wonderful product and support

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  0 of 0 people found the following review helpful:
5 of 5 Baader Contrast Booster Filter December 6, 2020
Reviewer: Edward Look from Westbury, NY United States  
Well, I haven't had the opportunity, literally due to lack of clear nights, to test it out.  I will admit everyone whom I saw who wrote about it liked it, particularly when used on Mars.  However, the ordering was quick and easy and it was shipped to me very quickly with no issues.  Why did I choose EyepiecesEtc.com?  Don Pensack, proprietor is an informative and insightful contributor to Cloudy Nights' forums and why not patronize someone's shop, the owner of which is one of the crew at Cloudy Nights?  If I can, I might add to this after I get a chance to test the filter out.

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  0 of 0 people found the following review helpful:
5 of 5 Nice filter and great service November 9, 2020
Reviewer: Thomas Greene from San Francisco Bay Area  
This filter works well on Mars - it boosts contrasts on dark surface features without washing out the South Polar cap or other brighter whiteish features.

I received it very quickly and Don provided great communication about the order and its shipping status.

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  0 of 0 people found the following review helpful:
5 of 5 Using the filter on a Nexstar6SE November 5, 2020
Reviewer: Thomas Dillon from Minnetonka, MN United States  
Thanks for getting the booster sent earlier than was expected. Used it at 88x,120x,176x, and 250x for Jupiter about 6 PM on 11/3/20. The object was yellow and white, stable and big. Easily saw 4 moo ns but did not see the red spot or stratification of colors. Maybe the red spot was not there. I am in a suburb of Minneapolis. Do you think that the general light pollution is preventing me from seeing detail? Is the telescope too small to see color stratification? What do you suggest. Thank you.

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