TS Optics Cassegrain telescope C 203/2436 OTA (60780)

Cassegrain telescopes offer the combined advantages of Newtonian telescopes and the compact size of catadioptric designs. The short optical tube helps minimize vibrations when mounted and makes the telescope easy to transport.

With its long focal length, this Cassegrain model is ideal for photographing the Moon, planets, and small but bright planetary nebulae—areas where Cassegrains excel. It can also be used for visual observation of galaxies and star clusters.

Additional Benefits

• Fast cooling and reduced dew issues, thanks to the open tube design

• No mirror shift, as the primary mirror is securely fixed; focusing is achieved through a high-quality focuser with reduction

• The focuser provides ample back focus for astronomical accessories

• Bright images are ensured by dielectric coatings, and high contrast is maintained due to minimal secondary mirror obstruction

• Compact construction makes the telescope suitable for travel and easy mounting

TS Optics is a brand by Teleskop-Service.

Specifications

Optics

• Type: Reflector

• Optical design: Cassegrain

• Aperture: 203 mm

• Focal length: 2436 mm

• Aperture ratio: f/12

• Resolving capacity: 0.68

• Limiting magnitude: 13.3

• Light gathering capacity: 840

• Maximum useful magnification: 406

• Tube weight: 7.5 kg

• Tube diameter: 230 mm

• Tube length: 580 mm

• Stray light baffles: Yes

• Tube construction: Full tube

Reflector

• Main mirror: Parabolic

• Secondary mirror: Hyperbolic

• Secondary mirror obstruction: 33%

• Reflectivity: 99%

• Secondary mirror material: Quartz

• Primary mirror material: Quartz

• Adjustable mirrors: Yes

Focuser

• Design: Crayford

• Connection to eyepiece: 2"

• Back focus: 150 mm

• Gear reduction: 1:10 fine focusing

Mount

• Mount type: OTA (Optical Tube Assembly only, no mount included)

Included Accessories

• Prism rail: Vixen-Style

• Finder base: Vixen/Skywatcher Level

• Eyepiece adaptor: 2" / 1.25"

Area of Application

• Astrophotography (Moon and planets): Yes

• Visual observation of the Moon and planets: Yes

• Visual observation of nebulae and galaxies: Yes

• Nature observation: No

• Solar observation: No (only with appropriate solar filter)

• Recommended for beginners: No

• Recommended for advanced users: Yes

• Suitable for observatories: No