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Astronomik ProPlanet 642 IR Pass Filter - 50 mm Round - P642-50R

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SKU: ASF-P642-50R

Astronomik ProPlanet 642 IR-Pass Filter - 50 mm Round


The ProPlanet 642 BP is the most recent addition to Astronomik's ProPlanet IR-pass filter family. This filter offers a wide assortment of applications for daytime IR photography, high resolution imaging of the Moon and planets, and capturing gorgeous deep sky images of objects in H-alpha regions when used for astro-imaging.

A 200 nm spectral window from 642 nm to 842 nm is provided by this filter. The P642 blocks the longer infrared, as opposed to the other two Astronomik ProPlanet filters. For your IR-imaging requirements, Astronomik now offers three distinct options. The ProPlanet 642 will frequently be the proper choice for ideal imaging.

Daylight IR-Imaging:

  • High contrast images feature superb color rendition
  • Clear "wood effect" images
  • No hot spot in the longer IR
  • Short exposure times, nearly identical to regular VIS-imaging
  • Best-suited for infrared videos


High Resolution Lunar & Planetary Imaging:

  • Short exposure times
  • Effective reduction in seeing
  • Optimized contrast
  • Blocking the longer IR eliminates ghosting and enables maximum sharpness


Deep-Sky Astrophotography of H-Alpha Regions:

  • Best transmission of H-alpha line at 656 nm
  • Close to 40 nm FWHM with astro-modified DSLR cameras
  • Amazing contrast even under the light of the Moon or in heavy light pollution
  • Reasonably priced filter for amateur H-alpha imagers
  • Camera display coupled with LiveView allows easy focusing


Technical Specifications


  • Over 96% transmission for wavelengths in the 642 nm to 842 nm range
  • Obstructs wavelengths from 350 nm to 630 nm
  • Parfocal with all other filters made by Astronomik
  • Glass thickness: 1 mm
  • Coatings offer full protection from the impacts of scratching, aging, and high humidity
  • Diffraction limited, this filter will not lessen the optical performance of your telescope
  • All Astronomik filters are delivered with a durable, high quality plastic storage case