Omegon Pro Field Flattener 2 inch

Omegon Pro Field Flattener 2-inch: the heavier flattener for longer refractors

This Pro-flattener is aimed at refractors with 500 to 1000 mm focal lengths and f/5 to f/9, the range of most medium APOs. It flatens the curved image field without changing the focal length: the same field of view, but sharp right to the corners.

The wide M68 telescope side suppresses vignetting on large sensors, where a narrower flattener would already shadow the corners before the optics correct them.

Working distance per focal length

The correct sensor distance is between 87 and 106 mm, depending on your refractor's focal length. Shorter focal lengths require the shorter distance; determine yours once with test shots on the corner stars.

M68 to M48

The telescope side is M68; an adapter to M48 is included, so standard camera adapters and 2-inch filter chains fit directly. The optical length with adapter is approximately 55 mm.

Fully multicoated

The coating keeps the contrast high and prevents reflections from bright field stars.

Included

• Pro field flattener
• Adapter to M48

Featured accessories

For refractors from f/5 to f/9 with 500 to 1000 mm focal length and an M68 or via the adapter M48 system.

For whom yes and for whom no

• ✓ Owners of medium-sized APOs without a model flatter
• ✓ Photographers with large sensors who want to avoid vignetting
• To maintain aspect ratio while correcting distortion
• ✗ Refractors outside the 500 to 1000 mm range
• Anyone who wants to shorten: choose a model-specific Pro Reducer

Specifications

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