Field Flatteners & Coma Correctors

The image plane of many telescopes is not plane, but curved. This results in a picture that has its optimal focus only in the center of the field of view - the edge of the field is out of focus and thus unsharp.

Superb quality, non-focal reducing Field Flattener optimised for DSLR imaging on refractor telescopes with focal ratios of between f/5.5 to f6.0. Will also provide much improved results on refractors with focal lengths narrowly outside this optimised f/range.

A brand new high quality field flattener for the Evoguide 50ED. If you want to image through this amazing igh quality widefield scope, then this accessory is a must have!

A non-focal reducing Field Flattener which gives improved results for photography with triplet and doublet refractor telescopes of between F5.5 and approximately F6.25 focal ratio.

The brand new RVO Horizon® 60 1.0x Field Flattener to suit the RVO Horizon® 60 ED refractor.

Please note this is a second hand item. Comes in its original box. Only one at this price. 

The 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 adapter is specifically designed to use the SBIG STL-11000 CCD cameras together with our TMB-designed FLT field flattener.

Explore Scientific MPCC Field Flattener with Canon EOS T2. Custom designed to be used with the Explore and Meade APOs. Includes a Canon fitting as standard.

Introducing the brand new RVO Horizon® 1.0x Field Flattener with integrated rotator to suit the RVO Horizon® 80 ED refractor. This high quality flattener will provide a beautifully flat field across the full width which is ideal for widefield imaging.

An optically-matched M48-fitting doublet field flattener for Skywatcher's Esprit 80 ED PRO triplet refractor.

Introducing the brand new RVO Horizon® 1.0x Field Flattener to suit the RVO Horizon® 102 ED refractor. This high quality flattener will provide a beautifully flat field across the full width which is ideal for widefield imaging.

Introducing the brand new RVO Horizon® 1.0x Field Flattener with integrated rotator to suit the RVO Horizon® 72 ED refractor. This high quality flattener will provide a beautifully flat field across the full width which is ideal for widefield imaging.

Introducing the brand new RVO Horizon® 0.8x Reducer / Field Flattener with integrated rotator to suit the RVO Horizon® 80 ED refractor. This high quality flattener will provide a beautifully flat field across the full width which is ideal for widefield imaging.

Optimised for all Sky-Watcher fast-ratio f/5 Newtonian Reflectors / Dobsonians, with 2” focuser. Delivers stunning wide-field views with pinpoint stars to the edge of the field. Magnification remains unaltered.

Introducing the brand new RVO Horizon® 0.8x Reducer / Field Flattener to suit the RVO Horizon® 102 ED refractor. This high quality flattener will provide a beautifully flat field across the full width which is ideal for widefield imaging.

The Baader Mark-III Coma Corrector is the long awaited replacement for the highly regarded Baader MPCC Coma Corrector.