Product number: C2_50S

EUR 665,05


incl. 19 % VAT (DE)  
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Astrodon 49.7 mm Square UV Blocking (no NIR Blocking) Clear Filter
Often purchased with Astrodon photometric filters, this 49.7 mm square unmounted clear filter blocks UV light, but unlike the luminance filter, it does not block NIR light. This filter provides 50% transmission at 395 nm (cut-on) while transmitting 97% or better to 1000 nm. It is parfocal with all other Astrodon filters including LRGB and Narrowband filters.

Astrodon 49.7 mm Square Clear Filter Highlights
Clear 49.7 mm square unmounted filter with UV blocking, but no NIR blocking
Provides 97% or more transmittance up to 1000 nm
395 nm cut-on (50% transmission at 395 nm)
3 +/-0.025 mm fused silica substrate before coating
1/4-wave propagated wavefront before coating
Parfocal with all other Astrodon filters
Manufactured in the USA


Please Note: There is no official picture of the C2 Clear 50S Filter, so we decided to show an image of the C2 Clear filter in a round format and one image showing a square filter in its protective sleeve.

About Astrodon UV blocking filters
Astrodon filters are high performing, durable filters that provide significant aid for astrophotography and research pursuits. Each filter is constructed using a highly innovative process with a single high quality 3 mm thick fused silica substrate and full hard oxide sputtered coatings. Astrodon UV blocking filters come in two different varieties - a Luminance "L" filter that blocks both UV and NIR, and a Clear "C" filter that only blocks UV. The former is identical to the Luminance filter included with the both the E-Series and I-Series Astrodon LRGB filter sets. This filter provides at least 97% transmission between 400 nm and 700 nm, while the Clear filter provides at least 97% transmission up to 1000 nm.
Filter type:Clear
Spectral range:395 nm (50% transmission) to more than 1000 nm
Transmittance:97% up to 1000 nm
Filter thickness:3 mm
Filter substrate:Fused silica
Filter shape:Square
Filter style:Drop-in
Filter size:49.7 mm
Clear Filter
Protective filter container



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