Sharpstar SCA260 V2 260 mm f/5 Aspherical Cassegrain Astrograph
The Sharpstar SCA 260 Aspherical Cassegrain Astrograph is optimized for astrophotography with large sensors and high resolution.
♦ Aperture 260 mm
♦ Focal length 1300 mm
♦ Focal ratio f/5
♦ Aspherical primary mirror made of PZ33 (similar to Pyrex) and spherical secondary mirror with 120 mm diameter
♦ Reflection of primary and secondary mirror is 95%
♦ 3-element corrector integrated in the tube
♦ Image circle: 80 mm diameter
♦ Primary mirror ventilation with temperature display for faster cooling down
♦ Carbon tube with tube ringa and Losmandy style dovetail bar at the base and flexible top plate at the top
♦ 3.35" dual-speed RAP focuser
♦ Working distance up to 102 mm
♦ Internal thread for 2" filter integrated
♦ Threads on focuser: M90, M68, M54 and M48
Description
Sharpstar SCA260 Aspherical Cassegrain Astrograph
The Sharpstar SCA260 is designed for dedicated astrophotographers who want a telescope with large aperture and good speed to be mobile. Weighing 14.5 kg, the telescope is well suited for mounts such as the Skywatcher EQ6 or the Celestron CGEM. The SCA260 has an aspherical primary mirror and a spherical secondary mirror. The 3-element field corrector in the tube creates a large corrected field of view of 80 mm diameter. This even allows the use of full frame sensors.
The tube of the SCA260 is made of carbon fiber to keep the weight down and improve thermal performance. This maintains the focus better than a metal tube, even with temperature changes. The integrated fan with indicator cools down the primary mirror faster. The power supply is available separately.
The 3.35" focuser features dual speed for accurate focusing and four threads for custom adaptations: M90, M68, M54 and M48. The correct working distance (back focus up to 102 mm) is automatically maintained by the corrector built into the tube - if the image is sharp, the best possible field correction has been achieved.
The telescope is optimized for astrophotography. The use of 2" accessories is not intended. However, the working distance of 75 mm from the M48 thread allows the use of 1.25" accessories.
Astrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model: Link to Astrobin
Additional service by TS - Optical and Mechanical Inspection
Each SCA260 undergoes a thorough optical and mechanical inspection upon arrival at Teleskop-Service. This service is included in the price.
♦ The telescope will be cosmetically inspected.
♦ The telescope is then mechanically inspected (main mirror and secondary mirror fit, focuser adjustment, etc.).
♦ The following optical test is done at the optical bench in autocollimation. Here the collimation is checked. With a Ronchi eyepiece, the smoothness and the curve of the optics are checked. Not only the individual components are checked, but the entire system.
♦ Each SCA is shipped with a complete checklist from Teleskop-Service.Specifications
Aperture: 260 mm Focal length: 1300 mm Focal ratio: f/5 Primary mirror type: Aspherical Primary mirror material: PZ33 (similar to pyrex glass) Secondary mirror: Spherical Secondary mirror diameter: 135 mm Diameter of secondary mirror mount: 150 mm Reflection: 95% Corrector: Three elements, air-spaced Image circle: 80 mm Visual limiting magnitude: 13.8 mg Tube material: Carbon fiber Tube diameter: 304 mm Tube diameter including front ring: 322 mm Tube length: 738 mm Tube weight: 14.5 kg Resolution: 0.46" Focuser: 3.35" RAP focuser - adjustment range 50 mm Distance M48 male thread to focal plane: 70 mm Distance M54 female thread to focal plane: 88 mm Distance M68 female thread to focal plane: 95 mm Distance M90 female thread to focal plane: 102 mm Dovetail bar: Losmandy style Fans: 3 fans with display - via external power supply 12 V Required power supply for temperature display: 2x LR 44 batteries (not included) In the box
♦ Telescope
♦ Dovetail bar and top plate
♦ Dust caps
♦ Checklist from Teleskop-Service
