SharpStar 130 mm f/2.8 Hyperbolic Newtonian Astrograph
- SharpStar 130 mm f/2.8 Newtonian Reflector
- Hyperbolic Newtonian Astrograph design
- 2.5" heavy-duty rack & pinion focuser
- 0.89 arcsecond resolution
- 12.3 limiting visual magnitude
- Supports full frame imaging in a 6.9 degree field of view
- 4.3 kg gross weight with tube ring, handle, and dovetail plate
- Includes tube rings, handle, Vixen dovetail & aluminum case
This SharpStar 130 mm f/2.8 Hyperbolic Mirror Newtonian Astrograph Reflector is a perfect addition to your optical equipment if you want to do astro-imaging with a fine quality, very fast Astrograph. This Astrograph from SharpStar is the smaller, lighter weight cousin to their flagship 150 mm model, which has proven to be very popular!
Compared with the conventional parabolic mirrors, the process of producing, manufacturing and testing hyperbolic mirrors is much more intricate. The Hyperbolic Mirror Newtonian Astrograph Reflector comes second to none considering its rather fast focal ratio. The telescope tube is wrapped with durable carbon fiber material, artistically enhancing its appearance while sharply decreasing its weight. Sharpstar 13028HNT adopts Pyrex-like glass, enabling the primary mirror to reach a quite stable imaging state in a short time. Both primary and secondary mirrors have an enhanced aluminum coating, thus keeping a reflectivity at more than 96%. The one-piece X-shaped strut of the secondary mirror keeps a solid and unbreakable structure. The included 2.5" rack-and-pinion focuser has a stronger load capacity and can be smoothly adjusted for best focus.
The delicately pierced handle bar is made from CNC-manufactured solid aluminum, which can be used as a base for the attachment of other accessories. The new design of the telescope handle is an aesthetic and mechanical improvement to satisfy the demands of astronomy enthusiasts.
A three-element corrector lens assembly is located in the optical path, enabling the whole optical system to better achieve full-frame imaging and control the vignette. The standard 55 mm back-focus and M48×0.75 thread tapped on the focuser also prepare the telescope for most stock imaging devices and make sure the item in the objective lens can be perfectly projected onto the focal plane.
This f/2.8 Hyperbolic Newtonian Astrograph Reflector from SharpStar is an ideal fast-f/number Astrograph for doing critical astro-imaging work. The Hyperbolic mirror design of this Astrograph will delight the most serious of astro-imaging enthusiasts when their images are revealed in the final processing. Refer to the photos provided to see the schematic diagram of the focal plane design and also the schematic diagram of attaching eyepieces or cameras to the focuser mechanism.
|Function:||f/2.8 Hyperbolic Newtonian Astrograph|
|Focuser:||2.5" Rack & Pinion, 10:1 Fine adjustment|
|Eyepiece/Accessory Barrel Size:||2.5"|
|Telescope Design:||Hyperbolic Newtonian Astrograph|
|Objective Aperture:||130 mm|
|Focal Length:||364 mm|
|Limiting Magnitude:||12.3 Visual Limit|
|Primary Mirror:||Hyperbolic Figure Mirror|
|Primary Mirror Material:||PZ33 (similar to Pyrex glass)|
|Corrector Lens:||2-element, air-spaced lenses. One is ED|
|Minor Axis:||65 mm|
|Image Circle:||44 mm|
|Tube Material:||Carbon Fiber|
|Tube Diameter:||174 mm|
|Tube Length:||394 mm|
|Weight:||3.2 kg, Net; 4.3 kg Gross|
|Back Focus:||55 mm|