The launch of Sharpstar SCA260
A fast-focal-ratio aspherical Cassegrain astrograph, fills up the existing service gap in domestic market. 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.
The telescope is wrapped with durable carbon fiber material, artistically enhancing its appearance while sharply decreasing its weight. Both the primary and secondary mirrors wear enhanced aluminum coatings, which ensure they can achieve a high reflectivity of more than 95%. The new-added adjustable bar on the secondary mirror makes the reflective mirror horizontally move. The 3" dedicated focuser with heavy-duty design has an extraordinary load capacity, and can be smoothly adjusted.
The delicately pierced handle bar is completely made from CNC-manufactured aluminum, which can be used as a base for the attachment of other accessories. The new design of the telescope handle can aesthetically and mechanically cater to the demands of enthusiasts.
A 3" corrector, featuring three-element lens structure, is laid in the optical path, enabling the whole optical system to better achieve full-frame imaging and control the vignette. The two-section thread design of the focuser prepares the telescope with popular M54×0.75 and M48×0.75 thread for most stock imaging devices and make sure the item in the objective lens can be perfectly projected onto the focal plane.
Caractéristics
- 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 (notincluded):75mm(start from the base of the M48 thread on the housing)
