Astronomy Specialist

SHARPSTAR 130 HNT HYPERBOLIC ASTROGRAPH F/2.8

$2,899.00

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The Sharpstar 130HNT is an astrograph with the ultra fast focal ratio of f/2.8 and a focal length of 364mm. Unlike the Newtonian optical design, this telescope features a hyperbolic primary mirror, a large 65mm secondary mirror and a 2 element corrector to be placed before the focal plane. The optical design delivers a 44mm fully illuminated and corrected image circle for large sensors such as the full frame (24x36mm).

The mirror is made of H-PZ33 borosilicate glass with a similar low expansion thermal coefficient to Pyrex. The enhanced aluminium mirror coating ensures a reflectivity over 96%. The large 65mm secondary mirror is rigidly kept in place by the monopiece secondary mirror spider that does not bend or twist.

The large rack and pinion 2.5" focuser can be rotated 360°and it has a reduction gear of 1:10 for precise focusing. The focuser is compatible with the ZWO EAF electronic focuser bracket.

All the lenses used in the corrector are fully multi-coated and the tube is internally blackened to reduce reflections and absorb stray light.

The tube is made of carbon fiber, the rack and pinion focusing mechanism of brass and the mechanical components are engineered to provide the best rigidity, performance and durability.


 

 

 

 

Optical design

Hyperbolic reflector with integrated corrector

Objective diameter

130 mm

Focal length

364 mm

Focal ratio

f/2.8

Secondary mirror 

65 mm (minor axis)

Obstruction

50%

Resolving power

0.89 arc second

Stellar limiting magnitude

12.3

Max. magnification

325 x

Light gathering power

345 times the human eye

Mount attachment

Losmandy style bar (200 mm)

Focuser

Rack & pinion, dual speed (10:1) 2.5" diameter

Camera connection

M48 x 0.75 male

Backfocus distance

55 mm

Tube weight

4.3 kg (including tube rings and dovetail bar)

Tube length

394 mm

Tube diameter

174 mm

Tube material

Carbon fiber

SKU

SS-13028HNT

 

 

  • SharpStar 130 HNT f/2.8
  • Tube rings
  • 200mm Losmandy style dovetail bar
  • Handle on the rings
  • M63 x 1 to M48 x 0.75 adapter
  • Foam-lined aluminium case

 

 

Sharpstar 130 HNT with full frame Sony A7R3.

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