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SCA260 260mm f/5 Aspherical Cassegrain

$4,301.31

Sharpstar presents the SCA260 260mm f/5 Aspherical Cassegrain astrograph.

SCA260 is designed with an aspherical mirror which entails much more sophisticated research and development. The process of producing, manufacturing and testing is more complicated compared with that of an ordinary reflective mirror.

Available on backorder

SKU: ASC10875 Categories: , ,
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Sharpstar SCA260 260mm f/5 Aspherical Cassegrain

The SCA260 260mm f/5 Aspherical Cassegrain astrograph by Sharpstar stands out with its innovative design. Featuring an aspherical mirror, this optical tube assembly (OTA) represents a significant leap in research and development, resulting in a more complex production, manufacturing, and testing process compared to conventional reflective mirrors.

This telescope boasts a durable carbon fiber exterior, adding both aesthetics and practicality by reducing its weight. The primary and secondary mirrors come equipped with enhanced aluminum coatings, ensuring an impressive reflectivity of over 95%. Notably, the secondary mirror features a newly added adjustable bar for horizontal movement, providing additional flexibility. The 3″ dedicated focuser, with its robust design and exceptional load capacity, allows for smooth adjustments.

Crafted from CNC-manufactured aluminum, the delicately pierced handlebar serves as a versatile platform for attaching accessories, meeting the demands of both form and function for enthusiasts.

Within the optical path, a 3″ corrector, with a three-element lens structure, enhances the optical system’s capacity for full-frame imaging and effective vignetting control. The two-section thread design of the focuser accommodates popular M54×0.75 and M48×0.75 threads, ensuring compatibility with most stock imaging devices to project subjects perfectly onto the focal plane of the OTA.

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 M48 thread on the housing)

 

Weight20 kg
Dimensions40 × 40 × 70 cm

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  • Primary mirror aperture: 260mm
  • Focal length/focal ratio: 1300mm/f5
  • Primary mirror type: Aspherical reflective mirror
  • Primary mirror material: PZ33 (same as pyrex glass)
  • Corrector rear group combination: Three element air-spaced lens structure
  • Minor axis diameter of the secondary mirror: 120mm
  • Secondary mirror holder diameter: 150mm
  • Secondary mirror type: Spherical
  • Image circle: 80mm
  • Tube material: Carbon fiber
  • Outer diameter of tube: 280.5mm
  • Tube length: 712mm
  • Tube weight: 15.2kg / 33lb-8oz with both dovetails
  • Resolution: 0.46″
  • Focuser: 3.2 inch
  • Visual limiting magnitude: 13.8
  • Available back focus: 75mm (calculated from the base of the M48 male thread)
  • Focuser travel: 40mm
  • Losmandy D-rail on the bottom / flat plate mounted atop the tube for attachement of guidescopes or other accessories
  • Cooling fans: 3 integrated units. Requires external 12V DC power supply (not included)
  • Requires 2x LR44 batteries (not included) for temperature display
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