Baader Contrast- Booster 1.25 Inch: £40.85

A Unique Filter For Many Different Astronomical Tasks

A unique filter for many different astronomical tasks - incomparable in image sharpness compared to combinations of basic colour filters, made of raw polished glass - where surface inaccuracy adds up in the optical wave front to an intolerable degree!

Eliminates the colour error inherent in popular 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. Colour recognition will be retained! The ultimate in lunar filters! - Moon (and Sun!) appear much more natural in colour (with a slight yellowish tint), compared to the usual low priced dark green Moon-filters, usually offered for beginners telescopes.
Completely removes distracting false colour 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; Used with the (Optically 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!
Optically 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 - as with raw polished (flame polished) glass!
Substrate (glass melt): Neodymium doped glass Coating / rear face: 7-layer hard-multicoating, featuring 0,2% 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.

See the below link to the advantages of the Baader Contrast Booster:

http://www.dasoc.org.uk/index.php/blog/133-dumbel-nebula-m27-in-colour

Please note that stock levels do fluctuate so please call or email to check today's stock before placing your order.

Package Deals