Astronomik CLS Light Pollution Filter - T-Threads

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Astronomik CLS Light Pollution Filter - T-Threads
$119.95
Item # AK-CLS-T
2 Questions(s)

Waiting List

  • The Astronomik CLS Light Pollution Filter has T-threads on both sides, allowing you to attach it to a T-adapter, etc. and still present a T-thread on the other side.
  • Blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass.
  • The Astronomik CLS Light Pollution Filter are optimized for use with aperture ratios from 1:3 to 1:15.
  • All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter.
Description

Details

Astronomik CLS Light Pollution Filter - T Thread

The Astronomik CLS is a budget filter for visual observation, Black & White photography and CCD photographs of nebulae, galaxies and star clusters with astronomical instruments of any size.

The Astronomik CLS blocks the light of the spectral lines of mercury and sodium-vapor lamps and lets the largest part of the visible light and H-alpha emissions pass. All the important emission lines, as well as the spectral region that the very well dark adapted eye can see, can pass through the filter.

The filters are optimized for use with aperture ratios from 1:3 to 1:15. Transmission losses and chromatic distortions, which are problems with other filters, only appear with Astronomik filters when extremely bright aperture ratios of 1:2 and more are used.

The Astronomik CLS Light Pollution Filter is good for use under both dark and urban skies for reducing light pollution made by mercury-vapor lamps. For film photography and modified DLSR use, the CLS filter gives good performance and near perfect color balance. While this filter does perform well with webcam and video equipment under light polluted skies, it is not suitable for planetary use.

Astronomik CLS Light Pollution Filter - T Thread Features.

  • 92% transmission at 486nm (H-beta)
  • 92% transmission at 496nm (OIII)
  • 92% transmission at 501nm (OIII)
  • 97% transmission at 656nm (H alpha)
  • Pass from 450 to 540nm and beyond 650nm
  • 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
Astronomik Product Number: CLS-T
Additional Information

Additional Information

SKU AK-CLS-T
Manufacturer Astronomik
Type of Filter Light Pollution Reduction
Filter Usage Imaging, Visual
Single or Set? Single Filter
Filter Size T-Thread
Filter Shape Round
Filter Mounted? Mounted
Warranty 10 Year Warranty
Reviews
Included Items

Included Items

  • Astronomik CLS Light Pollution Filter - T-threads
  • Plastic Storage Case
Questions & Answers

Product Questions

thickness of T mount
-4
The description states that this filter's usage is "imaging and visual". Does this mean that it can be threaded into the t-mount of an 8" EdgeHD and that it be threaded into an eyepiece?
-4
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