This Sharpstar 2" 0.95X triplet coma corrector can be used with Newtonian parabolic reflectors with apertures from 150mm to 600 mm and focal ratios of f/3 to f/6.   The MPCC coma corrector is designed for APS-C imaging with either DSLR or astronomy cameras. Its optimum image circle is 28 mm, with a maximum IC of 44 mm.  The reduction factor is 0.95×, effectively shortening the exposure time and improving the shape of stars.

• f/4 effectively reduced to f/3.8

• f/5 effectively reduced to f/4.75

• f/6 effectively reduced to f/5.7

Specifications

• Application：150mm - 600mm, f/3 through f/6 parabolic reflectors

• Reduction Factor：0.95X

• Image Circle：44 mm (maximum), 28 mm (optimal)

• Lens：Triplet structure

• Outer Diameter：50.8 mm (2")

• Back Focus：56 mm (field-stop ring to the focal plane)

• Length：79.7 mm

• Coating：Full-surface multi-layer coatings

• Weight：0.22kg