The Sharpstar SCA260 is a fast-focal-ratio aspherical Cassegrain astrograph telescope designed with an aspherical mirror which, according to the company, “Entails sophisticated research and development, with the process of producing, manufacturing and testing being more complicated compared with that of an ordinary reflective mirror.”
The Sharpstar SCA260 is wrapped with durable carbon fiber material, artistically enhancing its appearance while sharply decreasing its weight. Both the primary and secondary mirrors offer enhanced aluminum coatings, which ensure they can achieve a high reflectivity of more than 95%.
The adjustable bar on the secondary mirror provides the ability for the reflective mirror to horizontally move. The 3″ dedicated focuser with heavy-duty design has a high load capacity and can be smoothly adjusted. The handle bar is made from CNC-manufactured aluminum, which can be used as a base for the attachment of other accessories.
A 3″ corrector featuring a three-element lens structure is laid in the optical path, enabling the whole optical system to better achieve full-frame imaging and control vignetting. The two-section thread design of the focuser prepares the telescope with popular M54×0.75 and M48×0.75 threads for most stock imaging devices and make sure the item in the objective lens can be perfectly projected onto the focal plane.
The Sharpstar SCA260 specifications include:
– 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
– Limiting visual magnitude:13.8
– Back-focus:75mm(start from the base of the M48 thread on the housing)
You can learn more about the Sharpstar SCA260 here.
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