Baader Kontrast Booster 1.25" - against refractor's false colour - Teleskop-Express: Astro-Shop + Fotografie + Naturbeobachtung

Kontrastbooster1

Baader
in stock

Baader Kontrast Booster 1.25" - against refractor's false colour

49,00 EUR
incl. 19 % Tax
excl.Shipping costs

Description

Contrast Booster 1.25" - Contrast enhancement and reduction of false colour for refractors

The Contrast Booster is a further development of the simplier minus violet filters. It cuts off the blue part of the spectrum with its shorter wavelengths nearly complete - the false colour of achromatic refractors is nearly fully removed.

For which systems is the Contrast Booster recommended?

-- every achromatic refractor from 130mm aperture and bigger - if the intention is removing its false colour. The telescope's image gets a yellowish colour fog similar to minus violet filters but with significantly better results in contrast and sharpness.

Baader Contrast Booster filter transmission curve

Contrast booster filter curve:

It is easy to see that the short-wavelength part below 450nm is completely blocked.

Similar to the Skyglow Neodyminum, contrast enhancement is achieved by selective blanking out parts of the spectrum.

Especially for lunar and planetary observation the contrast is increased like with a combination of colour filters.

Characteristics and fields of use:

-	Eliminates false colour of achromatic refractors. It is recommended for 5" and bigger. For smaller telescopes, we recommend the Fringe Killer.
-	Removes the blue halo at lunar, solar and planetary observation and the loss of contrast.
-	Removes the blue halo at digital photography.
-	Surface details on Jupiter and Mars become more intense. If you never saw the Great Red Spot on Jupiter before - now you will have success!
-	More than 95% transmission! In opposite to dark green filters formerly used for Jupiter, a colourful, bright and brillant image is achieved.
-	Ultimative moon filter - the moon and the sun appear more naturally as with classical green moon filters (often delivered with cheap beginner telescopes). Disturbing glare is removed. You never saw the moon and the sun (with appropriate solar filter!) that sharp in a beginner telescope!
-	Blocks disturbing atmospherical straylight (Skyglow). The skies background becomes black.
-	Fits into all standard filter threads. For instance, it can be combined with the Baader IR cut filter. Now, unsharp pictures by unfocused Infra red radiation is prevented - a must for digital photography!
-	Plano-optically polished; can be used as a single filter for bino viewing or for afocal projection with digital cameras (far from the focal plane).
-	No loss of sharpness at magnifications above 150x compared with raw polished (flame treated) glasses.
-	Substrate: Neodymium dotted colour glass
-	Coating/back side: 7-layer multi-hardcoating Coating/front side: 23-layer Ion-beam long pass block coating
-	Hard and scratch proof coating on both sides - can be cleaned often.

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