Astronomik L1 UV-IR Blocking Filter- 2"

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  • Regular price $129.95
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Astronomik L1 UV-IR Blocking Filter- 2"

Astronomik L1 UV-IR Blocking Filter- 2"

Astronomik has a long history of top quality filters, and the L1 is just another testament to that reputation's truth. Working as a perfect UV-IR blocking filter, it lets the full range of sensitivity of the human eye (according to DIN 5031) pass, and blocks all other parts of the spectrum in the UV and IR. This makes it an ideal choice as a luminance filter for any kind of digital photography. It is optimized for systems with focal ratios between f/0.5 and f/50, and the typical transmission is higher than 99%. The UV-IR Blocker gives you a perfect parfocal filter for the luminance channel. It is also great as a dust protection for your telescope and camera. The high quality L1 has a very wide spectral window- see the graph above for exact transmission rates.

Technical Data and Specifications

  • Parfocal with other Astronomik filters
  • Glass thickness: 1mm
  • Completely resistant against high humidity, scratches and aging effects
  • Diffraction limited, the filter will not reduce the optical performance of your telescope!
  • Astronomik filters are delivered in a high-quality, long lasting, filter box
  • 2" Round Unmounted

Manufacturer Product Number: L1-2

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  • Re: Astronomik L1 UV-IR Blocking Filter- 2" What is the difference between the L1 & L2 filters?

    The L-1 filter is broader and designed to maximize luminance signal for pure reflecting telescopes (Newtonians, RCs). The L-2 filter is narrower and designed for Cassegrain variants (SCT/ACF/EdgeHD) where UV needs to be cut more. The L-3 filter is the n

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