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Astronomik MaxFR OIII 6 nm CCD 1.25 M28.5 Round Mounted Filter
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Astronomik MaxFR OIII 6 nm CCD 1.25" (M28.5) Round Mounted Filter

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SKU: ASF-OIII6-MAXFR-1
$269.95

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Astronomik MaxFR OIII 6 nm CCD
1.25" (M28.5) Round Mounted Filter

  • The MFR coating allows this 6 nm oxygen filter to be used on all instruments down to f/2
  • The MaxFR filter line by Astronomik is designed for fast optical systems (RASA, Epsilon, and other astrographs)
  • Best out-of-band blocking possible from ultraviolet (UV) through infrared (IR)
  • Experience very high contrast with no haloing
  • German engineering, made in Germany

About the Astronomik MaxFR 1.25" OIII 6 nm CCD Filter

This Astronomik MaxFR 1.25" Round Mounted OIII 6 nm CCD Filter is suitable for imaging OIII nebulas both in conditions of light pollution or dark skies! With a 6 nm FWHM, this parfocal filter is ideal for standard CCD cameras, allowing very fast optics to be employed. Blocking all wavelengths from UV to infrared (including the emission lines of sodium/Na and mercury/Hg artificial lighting) except around 501 nm, the MaxFR OIII CCD provides increased contrast for the doubly ionized oxygen emitted by OIII nebulae. Using this filter guarantees 88% transmission or more at OIII (501 nm). This filter is made to Astronomik's exacting standards. While transmission ratings may vary between each filter, you are guaranteed a transmission rating greater than 88%, with a typical transmission rating of around 92-95% for the 6 nm OIII. The specific T-Max will be listed on the filter case. You can rest easy knowing that every unit is thoroughly tested and guaranteed to meet Astronomik's stellar benchmark of performance!

About the Astronomik MaxFR Filter Line

This high-quality line of astrophotography filters uses a built-in MFR coating technique to produce the best out-of-band blocking possible, from the ultraviolet to the infrared. The MaxFR filter line by Astronomik is manufactured using an entirely new process specifically designed for fast optical systems and focal ratios. This results in extremely high contrast with no haloing!

Please note this filter must NEVER be used for solar observing or imaging. Doing so will cause permanent damage to your eyes.