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Astrodon UVenus filter 1,25 inch mounted
[ADN_UVenus-27R]

Prijs: 240,00 EUR

 

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Product Details

Astrodon UVenus filter 1,25 inch mounted

Astrodon introduces a breakthrough in UV filters for CCD imaging. A durable, hard--coated UV filter of the highest quality having the best transmission available.

The Astrodon-Schuler UV filter has traditionally been used for imaging Venus. It is made from several colored glasses, but only transmits ~ 65% of incoming UV light in the 300 - 400nm region.

Another vendor recently discontinued a 1.25" mounted UV filter due to NIR light leakage, but offers a 2" unmounted version that only reaches 80%T. Astrodon offers you both sizes and higher performance.

Like our highest quality Generation2 Astrodon LRGB filters, the UVenus filter minimizes halos around bright stars.

Astrodon UVenus filters are guaranteed to achieve >90% transmission. The actual scan below has an average transmittance of 98.2% from 325 - 381 nm, while minimizing out-of-band light leakage. This outstanding performance saves you time when imaging weak UV signals, while providing high contrast due to low light-leakage.

You do not need a separate filter to block the NIR with the UVenus filter.

Specifications

  • 1.25" mounted and 49.7mm diameter unmounted
  • 3.000+/-0.025mm substrate thickness
  • Single, striae-free fused silica substrate
  • 1/4 wave substrate prior to coating
  • < 0.5 arcminute parallelism before coating
  • Hard coated to edge
  • Guaranteed to > 90%T peak transmission (>94% typical)
  • <0.01%T 285-305 nm; <0.1%T 420 - 1100 nm
  • Image Venus during daylight due to elimination of all visible light
  • Proudly made in the U.S.A.

WARNING!

This filter is NOT to be used for visual observations, specifically the sun or UV light sources.

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