TS-Optics REFRACTOR 0.8x Corrector for TS 90 mm f/6 CF Apo

TS 0.8x Field Corrector for the CF-Apo 90 mm f/6

The corrector is designed for this apochromat and brings optimal astrophotographic results. Cameras up to full frame can be used and the star images are pinpoint up to the corners. In addition, the focal length of the apo is reduced to 432 mm. The focal ratio improves to f/4.8, saving about 36% in exposure time over a 1.0x flattener.

The connection of cameras to the corrector:

On the camera side, the corrector has an M48x0.75 male thread. This thread provides 15% better illumination than T2. Therefore we can recommend the corrector for all cameras up to full frame. The working distance is exactly 55 mm from the thread. The distance must be maintained very precisely, for best possible results. For all astro cameras there are suitable adapters for this thread and distance. We are happy to advise you.

Thread for 2" nebula filters available:

If you unscrew the camera adapter from the corrector, you have a 2" filter thread on the inside. There you can use nebula filters for contrast enhancement or IR cut filters. The working distance is not changed.

[[The connection on the telescope side:}]The corrector has an M63x1 male thread on the telescope side. With this thread, you can screw the corrector directly into the focuser of the TS CF apo. No tilting is possible and the star image remains optimal.

Adaptation of astro cameras with 17.5 mm distance from T2 thread to sensor:

Many astro cameras have a T2 connection thread and a back focus of 17.5 mm. With this adaption you have also integrated a 360° rotation, a quick coupling and still a mount for 2" filters. You need the following components, from the camera to the telescope:

T2AbstimmA05 (tuning ring with 0.5 mm height)

TSROTM48-T2 (adapter to M48, rotation, quick coupling and filter holder)

TSVF208 and TSFV210

The components are linked in the accessories section.

Customer photo with corrector

Our customer Mario Barrera from Chile took a photo with the TSCFAPO90 using this corrector:

Object: Dolphin Head Nebula (Sh2-308)

Photographer: Mario Barrera from Chile (Bortle 5)
Imaging optics: TS CF-APO 90 mm (TSCFAPO90)
Field corrector: TS-Optics 0.8x Corrector for TS 90 mm f/6 CF-Apo (TSCFRED90)
Motor focus: ZWO EAF (ZWO-5V-EAF-A)
Filter: Optolong L-Ultimate (L-ULTIMATE2)
Imaging camera: ZWO ASI2600MC Pro (ASI2600MC-P)
Exposure: 23 x 300 sec (1 h 55 min), additionally Flat + DFlat + Bias + Dark
Guiding scope: William Optics Guidestar 61 (alternative: TSMPT60)
Guiding camera: ZWO ASI290MM Mini (ASI290MINI)
Mount: ZWO AM5 (ZWO-AM5)

Many thanks to our customer Mario Barrera from Chile for this great photograph.