Astronomik MaxFR SII 6 nm CCD 1.25" (M28.5) Round Mounted Filter
Astronomik MaxFR SII 6 nm CCD
1.25" (M28.5) Round Mounted Filter
- The MaxFR filter line by Astronomik is designed for fast optical systems (RASA, Epsilon, and other astrographs)
- The MFR coating allows this 6 nm sulfur filter to be used on all instruments down to f/2
- Experience very high contrast with no haloing
- Best out-of-band blocking possible from ultraviolet (UV) through infrared (IR)
- German engineering, made in Germany
About the Astronomik MaxFR 1.25" SII 6 nm CCD Filter
The MaxFR 6 nm SII sulfur CCD filter is suitable for imaging cosmic bodies (including nebulae) along the singly ionized sulfur (SII) wavelengths. This narrowband, 6 nm filter works well both in conditions of light pollution or dark skies! Blocking all wavelengths from UV to infrared (including the emission lines of sodium/Na and mercury/Hg artificial lighting as well as nitrogen/NII) except for the SII singly ionized sulfur wavelengths which occur as a doublet at 671.7 nm and 673 nm. With an average of 94% transmission (90%+ guaranteed), this narrowband filter is a good choice for heavily light polluted observing sites, or for imaging faint objects in star-crowded regions of the night sky.
This Astronomik MaxFR 1.25" Round Mounted SII 6 nm CCD Filter is the optimal narrowband filter for CCD astrophotography. With a 6 nm FWHM, this parfocal sulfur filter is ideal for standard CCD cameras, allowing very fast optics to be employed.
About the Astronomik MaxFR Filter Line
The MaxFR filter line by Astronomik is manufactured using an entirely new process specifically designed for fast optical systems and focal ratios. 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. 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.