The Multi Purpose Coma Corrector Mark III eliminates coma across the full photographic field without manipulating the focal length.
The proprietary lens design has Phantom Group wideband multicoating on all air to glass surfaces and the large lenses deliver completely vignetting-free exposures with larger sensors. The coating treatment delivers the highest transmission combined with the lowest amount of scatter and reflections across a very wide spectral range from UV to NIR.
The new Mark III has been designed for Newtonian telescopes from f3.5 to f7. Stars remain pinpoints across the field and the visual use likewise is made much easier - with the help of the 2" (M48) male filter thread at the eyepiece facing side.

Baader MPCC Multi Purpose Coma Corrector installed on Canon 6D DSLR.