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TS-Optics 8 "f / 12 Cassegrain telescope 203/2436 mm OTA

Cassegrain telescopes combine the advantages of a Newtonian telescope as a pure mirror system with a short design. Visually, Cassegrain telescopes are superior to conventional Schmidt-Cassegrain telescopes. Cassegrain telescopes are mainly used for photography of the moon and planets and for the observation of astronomical objects. Thanks to very sensitive sensors in astro cameras, even photography of nebulae, star clusters and galaxies is possible.


Product advantages:

Large, corrected and illuminated field of view thanks to parabolic main and hyperbolic secondary mirror with less field curvature than with SC telescopes.
Pure reflection system without Schmidt plate, so infrared photography is also possible with full focus.
Significantly faster cooling than with the SC, thanks to the open design.
Brighter image thanks to 99% dielectric mirroring on the main and secondary mirrors.
No shifting because the main mirror is fixed.
High quality 2 "Crayford focuser with micro reduction and ring clamping of 2" and 1.25 "accessories
33% shadowing from the secondary mirror, comparable to SC telescopes.
Better sharpness on the axis thanks to precise mirror surfaces and the removal of the Schmidt plate.
Less problems due to dew, with SC telescopes the Schmidt plate often thaws, which is not the case with the Cassegrain.
Inner screens in the tube for even more contrast.
Generous back focus for the use of 2 "accessories.
Compact tube with a length of only 580 mm - is also carried well by smaller mounts.
The main and secondary mirrors are adjustable

Versatile use of an all-rounder:
Mobile travel telescope: Take the compact and light telescope with you on vacation. You can unscrew the focuser in a few simple steps, making the Cassegrain even more compact.

Telescope for the observation of astronomical objects: Due to the bright and high-contrast image and above all due to the large corrected and illuminated image field, the Cassegrain is ideally suited for the observation of astronomical objects. You can easily use 2 "and 1.25" accessories. The shadow from the secondary mirror is only 33%. This is comparable to Schmidt-Cassegrain telescopes. However, the 99% reflection of the main and secondary mirrors makes the image much brighter. The sharpness in the field is also better because the image field is almost flat.

Telescope for astrophotography: The Cassegrain is well suited for photography of the moon and planets. The contrast of the picture is very high. Stray light is effectively suppressed by the inner panels. Planets and the smallest lunar craters are displayed without any color errors. Thanks to its micro-reduction, the Crayford extract enables precise focusing. With modern and highly sensitive CMOS sensors, even deep sky photography with the TS-Optics Cassegrain is within your reach. An additional corrector lens is not required because the image field is corrected well beyond the APS-C format.


Technical specifications:

Opening 8 "- 203 mm
Focal length 2436 mm
Opening ratio f / 12
Tube diameter: 230 mm
Tube length: approx. 620 mm
Weight: 7.5 kg
Shading through the secondary mirror: 33% (linear)
Excerpt: 2 "Crayford excerpt with reduction
Connection thread at the tube end: M90x1 external thread
Vixen GP track - Skywatcher EQ5 level; Losmandy level
Large illuminated image field with a diameter of 45 mm
Hyperbolic secondary mirror and parabolic primary mirror made of quartz glass for a stable focus position
99% reflection on the main and secondary mirrors for an even brighter image


Scope of delivery:
8 "f / 12 Cassegrain OTA
2 "pull-out with reduction to 1.25"
Prism rails GP / EQ5 and Losmandy Level
Dust protection cap for pull-out and front
Mounted finder shoe
M90 extension sleeves
German-language adjustment instructions





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