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1.25 Inch UHC (Ultra High COntrast) Light Pollution Reduction Filter

1.25 Inch UHC (Ultra High COntrast) Light Pollution Reduction Filter

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Improves the image contrast of observed objects by filtering out scattered light

Sharpens and clarifies deep-sky objects

Ideal for astronomical observations and astrophotography

UHC (Ultra High Contrast) filter allows the transmission of nearly 100% of the radiation from both O-III and the H beta lines

Suitability

Visual observation (dark skies): Very good, for telescopes of all apertures and high exit pupil

Visual observation (urban skies): Very good, for telescops from 100 mm aperture

Film photography: Reasonable, but very long exposure time

CCD photography: Good, when used with an additional IR-block-filter

DSLR photography (original): Good, colour balance shifted but contrast enhanced

DSLR photography (astro modified): Very good, colour balance is near perfect

DSLR photography (MC modified): Good, when used with an additional IR-block filter

Webcam / Video (Planets): Unsuitable

Webcam / Video (Deep Sky): Good, if light pollution is a big problem

Technical Data

Transmission of nearly 100% of O-III and H-beta

Transmission of 96% of H alpha

Entire Blocking of annoying wavelengths

Ideal All-round Deep Sky filter even for small telescopes

Size: 8 x 8 x 2 cm

Material: glass