Omegon Pro Coma Corrector for Astrograph

Omegon Pro Coma Corrector for Astrograph: round stars right to the corners of your astrograph

A fast Newtonian produces coma: stars off-center stretch into little comets, and the faster the f-number, the worse it gets. With an f/4 astrograph, that is visible in every corner of the image without a corrector.

This corrector eliminates coma. It fits into the 2-inch focuser and projects a corrected, flat field onto the sensor, keeping stars round right to the edge.

For Newtons up to f/4

The two-element lens system is designed for fast mirrors down to f/4. The 75 mm back focus provides room for a filter wheel or filter drawer between the corrector and sensor.

Connections complete

The camera side is M48 and a T2 adapter is included, so both astronomy cameras and DSLRs with a T2 ring connect directly. The filter thread accommodates a 2-inch filter.

Featured accessories

For Newton telescopes and astrographs up to f/4 with a 2-inch focuser. Measure the distance from corrector to sensor at exactly 75 mm for the best result.

For whom yes and for whom no

• ✓ Owners of a fast Newtonian or astrograph
• ✓ Astrophotographers suffering from stretched corner stars
• ✓ Who wants to connect with M48 or T2 without extra adapters
• Slow Newtons from f/6: coma is barely visible there
• ✗ Refractors: they need a flattener, not a coma corrector

Specifications

You can find more correctors and reducers for this brand on the Omegon brand page.