SharpStar 130 mm f/2.8 Hyperbolic Newtonian Astrograph Reflector - 13028HNT-AL - Newest Model!

SharpStar 130 mm f/2.8 Hyperbolic Newtonian Astrograph with All Aluminum Tube

• SharpStar 130 mm f/2.8 Newtonian Reflector
• Hyperbolic Newtonian Astrograph design
• All aluminum tube assembly
• Minor mirror axis is 65 mm for Full Frame illumination
• 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 13028HNT-AL model offers further enhancements to the structure stability of the optical axis of the primary mirror, and there are three sets of adjustment screws at the bottom of the lens tube for adjusting collimation.

SharpStar has also improved the bracket structure of the secondary mirror to make it more stable. The secondary mirror bracket is CNC machined with integrated manufacturing so there is no misalignment, ensuring beautiful diffraction spikes during astrophotography.

The Sharpstar 13028HNT-AL 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 dual-speed rack-and-pinion focuser is very rigid and compatible with most motorized focusers.  The focuser is designed with an enlarged handwheel, integrated camera rotator and locking screw, and a built-in doublet corrector. The structure of the focuser is very stable and can carry 3kg.

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.

Specifications: