Returned: TS-Optics REFRAKTOR 0.75x Reducer Corrector for ED-APO for full format

The Photoline field corrector for astrophotography shortens the focal length to 75% and increases the aperture of refractors while fully correcting the field of view.

♦ Focal length reduction: 0.75x - exposure time is almost halved.

♦ Field correction and illumination up to 44 mm diameter; the corrector is designed for use up to full-frame format.

♦ Multi-coating and anti-reflective coating prevent flare and ghosting.

♦ The corrector is suitable for APO and ED refractors with a focal length of 480 mm and above.

♦ Connection on the telescope side: M68x1 male thread and M74x1 female thread (Skywatcher Esprit ED 120 and 150)

♦ Connection on the camera side: M68x1 male thread, M54x0.75 female thread, and M48x0.75 male thread

♦ Working distance: 55mm from the M48 male thread, 56.5mm from the M54 female thread, and 60mm from the M68 male thread

TS-Optics Photoline Apo-Reducer 0.75x for apochromatic and ED refractors
The 3-lens 0.75x reducer and flattener is designed for apochromatic refractor telescopes. The corrector is suitable for almost all refractors with eyepieces 2.5" and larger. The focal length is reduced to 75% and the aperture is increased accordingly. At the same time, the field of view is corrected. Cameras with sensors up to full-frame can now be used. Transform your refractor into a fast astrograph with the Photoline 0.75x Reducer.

The main advantages of the Photoline 0.75x Reducer:

♦ A new design solves the problem of tilting.
♦ The corrector can be used on all refractors with eyepieces 2.5" and larger. The required backfocus is 130 mm from the connection thread. Any refractor designed for 2" can also work with this reducer.
♦ The working distance from the M48x0.75 thread is 55 mm. Ideal for astro cameras and DSLR/SLR cameras.
♦ The corrector offers three connection threads on the camera side for maximum flexibility: M68x1 male thread, M54x0.75 female thread, and M48x0.75 male thread.
♦ The corrector fits all focusers with the M74x1 male thread and the M68x1 female thread. Transition adapters, e.g., to M63x1, are of course available.

Working distance from the corrector to the camera:
Due to the new design, the corrector tolerates deviations from the working distance of up to +/- 1 mm. Nevertheless, you should maintain the distances as precisely as possible.

From a focal length of 700 mm, the following apply Working distances:

♦ From the M48x0.75 external thread: 55 mm
♦ From the M54x0.75 internal thread: 56.5 mm
♦ From the M68x1 external thread: 60 mm

♦ For apo lenses with a focal length of 600 mm to 700 mm, the working distance is extended by 1 mm.
♦ For apo lenses with a focal length of 550 mm to 690 mm, the working distance is extended by 3 mm.
♦ For apo lenses with a focal length of 480 mm to 540 mm, the working distance is extended by 5 mm.

Suitable adjustment rings and extension tubes are linked in the accessories section.

Telescope-side connection: M74x1 female thread and M68x1 male thread
Camera-side connection: M68x1 male thread, M54x0.75 female thread, and M48x0.75 male thread
Recommended working distance: 55 mm from the M48x0.75 connection thread
Reduction factor: 0.75x
Lens: 3 lenses - each fully multi-coated
Fully corrected and illuminated field: D=44 mm
Length: 62.5 mm
Diameter: 78 mm

♦ TS Photoline 0.75 Reducer
♦ Adapter from M54x0.75 to M48x0.75
♦ Adapter from M74x1 to M68x1
♦ Metal dust caps for both sides (camera-side: item KIM68)