This telescope is checked, measured and, if necessary, adjusted by us before delivery. The focuser is adjusted.

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Sharpstar SCA260 V2 260mm f/5 Aspherical Cassegrain Astrograph


The Sharpstar SCA 260 Aspherical Cassegrain Astrograph is optimized for astrophotography with large sensors and high resolution.

♦ Opening 260 mm

♦ Focal length 1300 mm

♦ Aperture ratio f/5

♦ Aspherical primary mirror made of PZ33 (similar to Pyrex) and spherical secondary mirror with 120 mm diameter

♦ Reflection of the main and secondary mirrors is 95%

♦ 3-element corrector integrated in the tube

♦ 80mm diameter image circle

♦ Main mirror ventilation with temperature display for faster cooling

♦ Carbon tube with pipe clamps and Losmandy Level prism rail on the base and flexible top plate on the top

♦ 3.35" RAP focuser with micro reduction

♦ Working distance up to 102 mm

♦ Internal thread for 2" filter integrated

♦ Threads on the focuser: M90, M68, M54 and M48

Sharpstar SCA260 Aspherical Cassegrain Astrograph
The Sharpstar SCA260 is designed for dedicated astrophotographers who want to use a telescope with a large aperture and good light intensity on the go. With a weight of 14.5 kg, the telescope is well supported by 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 image field with a diameter of 80 mm. This even enables the use of full-format sensors.

The SCA260's tube is made of carbon fiber (carbon) to keep weight down and improve thermal performance. This means that the focus is maintained better even when the temperature changes than with a metal tube. The integrated fan with display cools down the main mirror more quickly. The power supply is available separately.

The 3.35" focuser offers a micro reduction for precise focusing and four threads for individual 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 - this is the image sharp, the best possible field correction is 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 on Astrobin with this telescope

Opening: 260mm
Focal length: 1300mm
Aperture ratio: f/5
Primary mirror type: Aspherical
Main mirror material: PZ33 (similar to Pyrex glass)
Secondary mirror: Spherical
Secondary Mirror Diameter: 120mm
Secondary mirror mount diameter: 135 mm
Reflection: 95%
Corrector: Three elements with air gap
Image circle: 80 mm
Visual limit size: 13.8 mag
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 M48x0.75 external thread to focal plane: 70 mm
Distance M54x0.75 internal thread to focal plane: 88 mm
Distance M68x1 internal thread to focal plane: 95 mm
Distance M90x1 internal thread to focal plane: 102 mm
Prism rail: Losmandy level
Fans: 3 fans with display - via external power supply 12 V
Required power supply for temperature display: 2x LR 44 batteries (not included)


♦ Telescope
♦ Prism rail and top plate
♦ Dust caps