3-element Newtonian coma corrector for Newtonian telescopes from f/3 to f/6 with the best illumination of its class.

• Short design with only 99 mm length for a better illumination than with all other Wynne correctors. Full frame format is not only fully corrected, but also fully illuminated.
• 65 mm working distance for enough space for all adaptions.
• M68 ZEISS level threaded connection – with this, the entire M68 adapter range is open to you.
• The corrector works without changing the focal length.
• The corrector needs a focus position at 150 mm above the tube – that is less than with all other Wynne correctors and keeps the secondary mirror small.
• Designed by the world-famous optics designer Massimo Riccardi – a high-end corrector of the reference class.

TS-Optics 3″ Wynne Newtonian Coma Corrector with improved illumination

Teleskop-Service commissioned the well-known optics designer to develop further the proven Wynne coma corrector design. The problem of all Wynne correctors is the illumination. Due to the length, the field lens of the corrector vignettes. Thus 3″ Wynne correctors even do not achieve 30 mm fully illuminated field at f/4.

The result of this development is the TS 3″ Wynne corrector with significantly illumination and, at the same time, outstanding sharpness over the field. Thus cameras with full frame format sensors and even large format sensors can be used. Simultaneously, we were able to increase the working distance to 65 mm for making possible to use nearly all common CCD and DSLR cameras. In this case, the working distance corresponds to the distance between the vertex of the last lens surface and the sensor (in other words: the back focal length), and it is largely independent of the telescope.

Here are the working distances, calculated directly by Massimo Riccardi

250/4 ——- 64 mm
250/5 ——- 64.4 mm
300/4 ——- 65 mm
300/5 ——- 65.2 mm
400/4.5 —– 65.8 mm

These values are very close to each other, which explains why a single distance of 65 mm is sufficient in practice without loss of quality.