Sharpstar SCA260 Aspherical Cassegrain Astrograph
 Sharpstar SCA260 Aspherical Cassegrain AstrographSharpstar SCA260 Aspherical Cassegrain Astrograph 

Sharpstar SCA260 Aspherical Cassegrain Astrograph

£3,590.00✓ 2 year warranty


Out of stock due 15-20 working days

About this product

Model:  sharpstar_sca260

The SCA260 is the latest Astrograph from Sharpstar and offers a large aperture combined with a fast focal ratio and well corrected wide field.

Designed for use with camera sensors up to full frame.
The SCA260 features an aspherical primary mirror and both primary and secondary mirrors feature enhanced 95% reflective coatings.
A 3" three element field corrector is incorporated into the optical path that ensures a well illuminated, wide and flat field.
The optical tube is made from carbon fibre for both light weight and rigidity with less thermal shift.
At the focal plane of the SCA260 is a heavy duty 3" rack and pinion focuser which has excellent load bearing capacity, a 1:10 dual speed mechanism and which provides very smooth performance free of image shift.
The two-section thread design of the focuser provides the telescope with popular M54×0.75 and M48×0.75 threads for most stock imaging cameras and accessories.
The focuser is compatible with popular motor focuser add ons including the ZWO EAF.
The SCA260 is a good alternative to an SCT instrument and benefits from not having a full aperture corrector liable to attract condensation,  and the provision of a high quality 3" focuser (instead of primary mirror focussing) which ensures collimation stability and focussing precision.
The SCA260 is ideal for both medium wide field imaging with full frame sensors and high resolution imaging of smaller galaxies and nebulae with smaller sensors.
  • Aperture size:260mm
  • ​Focal length:1300mm
  • Focal ratio:f/5
  • Primary mirror type:aspherical reflective mirror
  • Primary mirror material:PZ33(similar to Pyrex glass)
  • Corrector:three-element air-spaced lens structure
  • Minor axis:120mm
  • Secondary mirror type:spherical reflective mirror
  • Image circle:80mm
  • Tube material:carbon fiber
  • Tube outer diameter:280.5mm
  • Tube length:712mm
  • Tube weight:15kg
  • Resolution:0.46
  • Focuser:3.2"
  • Limiting visual magnitude:13.8
  • Back-focus:75mm(start from the base of the mounting thread on the housing)


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