Field Flatteners & Coma Correctors

Baader Planetarium Rowe Coma Corrector - Use this fantastic product to correct the Coma that is inherent in fast Newtonian imaging.

Please note this is a second hand item. Great condition and checked by the RVO team. 

Brand new 0.8x adjustable reducer flattener by William Optics to suit the Zenithstar 73 series. Comes complete with integrated rotator and 2" filter holder.

An optically-matched M48-fitting doublet field flattener for Skywatcher's Esprit 100 ED PRO triplet refractor.

The 0.8x reducer can bring Askar 103APO's focal ratio down to F5.4. This is a standard reducer with field flattening capabilities as well. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times.

The 1x flattener does not change the telescope's focal ratio itself. After connecting with the Askar 103APO, it still maintained a focal length of 6.8.

Designed for serious Astro-Imagers. Optimised for the Evostar-72ED PRO, this superb quality accessory effectively reduces the telescope’s focal length by a factor of 0.85x and provides much improved field-edge correction.

Brand new adjustable field flattener for the William Optics Zenithstar 61 OTA. This is a brand new 2019 item which is now in stock at Rother Valley Optics.

Brand new adjustable field flattener for the William Optics Zenithstar 73 OTA. This is a brand new 2019 item which is now in stock at Rother Valley Optics.

This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. WO Flat 6Alll will provide good illumination and flat field across 97% of full frame sized sensors.

The HoTech SCA field flattener accomodates f5 to f8 refractor telescope. You will see bright and sharp image across the entire field.

Sharpstar 2" 0.95× coma corrector can be applied to most marketable Newtonian reflective astrographs. It’s of high quality and easy to use.

The Takahashi 1.01x flattener has been introduced to cure the mild field curvature and edge of field astigmatism when using larger format cameras. The focal ratio is slightly increased when using this accessory.

Two-element design incorporating one ED element. Reduces the standard focal length of the Evolux-82ED by a factor of 0.9x and provides top quality field-edge correction.

Takahashi has released a new flattener for use with FS and FC series telescopes that is an improvement when compared to previous flatteners available for these telescopes.

This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics FLT 91

Two-element design incorporating one ED element. Reduces the standard focal length of the Evolux-62ED by a factor of 0.9x and provides top quality field-edge correction.