[USATO] TSGPU

Codice articolo: [USATO] TSGPU

Very good coma correction for Newtonian telescopes from f/3.5 to f/6 (the photograph at left was taken with an 8" f/4 Newtonian)

Usato, ottime condizioni

♦ 4-element coma corrector for excellent imaging in the field and on the axis.

♦ Designed by Gyulai Pal in Hungary (GPU-Optics)

♦ Perfectly suitable for Newtonian telescopes with focal ratios of f/4 - provides very good results from f/3.5 to f/6.

♦ Very tolerant against tilting.

♦ Focal length is not changed.

♦ Camera connection through M48 thread.

♦ The focus position is moved outwards by 20 mm.

♦ For better stability and accuracy, the corrector can be screwed to the focuser. Connection adapters for cameras and focusers are available.

The TS GPU Aplanatic Newtonian Coma Corrector for Astrophotography
The coma corrector has been designed by Pal Gyulai - GPU Optics - for Newtonian telescopes with a focal ratio of f/4. The result is a high-quality 4-element corrector which offers round stars over the entire image field even with larger camera sensors.

In opposite to 2-element correctors, the stars are not enlarged, there are no halos. Furthermore, the whole construction is designed to be free from reflexes. Even bright stars wll be shown without reflexes or ghostings.

The Advantages of the GPU Coma Corrector:

Very good coma correction for Newtonian telescopes from f/3.5 to f/6 (the photograph at left was taken with an 8" f/4 Newtonian).

♦ No change of the focal length.

♦ The focus plane is shifted outwards by 20 mm. This prevents the corrector from protruding into the inside of the tube.

♦ Stars are smaller - no halo effects.

♦ The corrector can be clamped, but also screwed to the focuser by an optional adapter.

♦ The TS GPU corrector offers correction up to full-frame sensors. For perfect illumination, a FLAT is necessesary.

The optimal working distance from the M48 thread to the camera sensor:
The optimal distance depends from the focal length of the Newtonian telescope. With out wide range of adapter, you can always obtain the ideal distance.

♦ Focal length up to 600 mm - working distance 53 mm
♦ Focal length 610 mm and more - working distance 55 mm

Die Innovation from TS Optics - screw the GPU corrector to the focuser.
With optional adapters you can screw the corrector to the drawer. For this purpose the corrector has an extended M48x0.75 thread on the camera side. Simply turn down the lock ring and you have 3mm more M48 thread for screw adaptations available.

By the threaded connection, you gain stability and also accuracy. The image is improved and heavy cameras can be used, too.

Type: Newtonian coma corrector
Optics: 4-element system
Length: 100 mm to the camera connection
Working distance: 52 to 55 mm - depending on the focal length of the telescope (see table in "Details")
Connecting thread at the camera side: M48x0.75 male - length 5 mm
Filter thread for 2" filters: yes
Counter ring with M48 female thread: length 3 mm - can be unscrewed for screw adaptations
Coating: Multicoating on each lens