Sharpstar 2" 0.95× Newtonian Coma Corrector / Reducer is a compact optical accessory designed for astrophotography with fast Newtonian telescopes. The triplet optical design effectively corrects coma produced by a parabolic primary mirror while simultaneously reducing the telescope focal length by a factor of 0.95×. This results in a wider field of view and shorter exposure times. The corrector is optimized for APS-C sensors and provides improved star shapes across the imaging field.

Key features

• coma corrector with focal reducer for Newtonian telescopes
• 0.95× reduction factor for wider field of view and shorter exposures
• triplet optical design (3 elements)
• optimized for APS-C sensors (28 mm image circle)
• maximum image circle up to 44 mm
• designed for Newtonian telescopes with focal ratios f/3–f/6
• standard 2" (50.8 mm) barrel connection
• full multi-layer coatings on optical surfaces

Box contents

• Sharpstar 2" 0.95× coma corrector
• field-stop ring

Technical specifications

• application: 150–600 mm parabolic Newtonian reflectors
• telescope focal ratio: f/3–f/6
• reduction factor: 0.95×
• image circle: 28 mm (optimal), 44 mm (maximum)
• optical design: triplet (3 elements)
• backfocus: 56 mm
• outer diameter: 2" (50.8 mm)
• length: 79.7 mm
• coating: full multi-layer coatings
• weight: 0.22 kg

The Sharpstar 2" 0.95× corrector is a practical upgrade for fast Newtonian astrographs, improving star shapes while slightly reducing the focal length to provide a wider field and more efficient deep-sky imaging.