SharpStar 150 mm f/2.8 Hyperbolic Newtonian Astrograph Reflector - SHA-15028HNT

Out of stock
Regular price $2,730.00 CAD

Product details

  • SKU SHA-15028HNT

SharpStar f/2.8 Hyperbolic Newtonian Astrograph Reflector

  • SharpStar 150 mm Aperture 420 mm Newtonian Astrograph
  • Ideal for use with both imaging and observation
  • Hyperbolic Newtonian Astrograph design
  • 2.5" heavy-duty barrel rack & pinion focuser
  • 0.77 arcsecond resolution
  • 12.7 limiting visual magnitude
  • 5.95 kg gross weight with tube ring, handle, and dovetail plate
  • Includes tube rings, dew cap, handle, and dovetail mounting plate

This SharpStar 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, and also want to do observing with a high quality Newtonian Reflector with a wide field of view and low-aberration images. This Astrograph from SharpStar is a newer design which fills a previously existing gap in the astronomy market place.

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 15028HNT 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, but is also good for visual observation when a wide field, lower magnification optical system is appropriate. 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.


Manufacturer: SharpStar
Mfr. SKU: 15028HNT
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: 150 mm
Focal Length: 420 mm
Focal Ratio: f/2.8
Resolution: 0.77 arcsecond
Limiting Magnitude: 12.7, Visual Limit
Coatings: Enhanced-Aluminum coatings
Primary Mirror: Hyperbolic Figure Mirror
Primary Mirror Material: PZ33 (similar to Pyrex glass)
Corrector Lens: 3-element, air-spaced lenses
Minor Axis: 70 mm
Image Circle: 44 mm
Tube Material: Carbon Fiber
Tube Diameter: 195 mm
Tube Length: 445 mm
Weight: 4.45 kg, Net; 5.95 kg Gross
Back Focus: 55 mm