Tecnosky 90 mm f/5 Flatfield APO AG90 Refractor Telescope

Tecnosky 90 mm f/5 Quintuplet Apo with full field correction beyond full frame format

The 90 mm f/5 quintuplet apochromat has been developed for astrophotography with large, but also high-resolution sensors, as they are installed in modern astro cameras and system cameras. The image is free of disturbing chromatic aberrations and reflections with very good sharpness over the entire image field.

The telescope is very compact with a good 5.2 kg and only just 36 cm transport length and even suitable for air travel. We recommend a mount of the EQ5 class or more stable as a base.

Other features and benefits of the 90 mm f/5 quintuplet:

The corrector is fixed in the tube, once you focus the camera you are automatically at the right distance for optimal field correction.

The 3.7" focuser comes with an extension from M63x1 to M48x0.75 with screw-in option for 2" filters.

Tilting mechanism with tension and compression screws to compensate for camera sensor skew for perfect edge stars.

Each 90 mm quintuplet apo is optically and mechanically checked at Teleskop-Service before shipment.

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Technical Information

Teleskop-Service has collected a lot of helpful information about refractors and provided it in English as a PDF file: refractors.pdf

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin