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Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 1
Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 2
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Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 1
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Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 9
Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 10
Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 11
Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA - 12

Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA

SS_13028HNT-AL
€1,875.00
Tax included

Sharpstar 15028HNT-AL 150mm F2.8 Hyperbolic Newtonian Astrograph

  • Aperture size: 130mm
  • Focal length: 364mm
  • Focal ratio: 2.8
  • Corrector: three-element air-spaced lens (one ED element)
  • Image circle: 44mm
  • Field of view: 6.9 degree
  • Tube material: aluminium
  • Net weight:3.8kg
  • Gross weight: 4.8kg (including tube rings, handle and Losmandy-style dovetail plate)
  • Focuser: 2.5" with fine adjustment
  • Back focus: 55mm

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Hyperbolic Newtonian reflector with 130mm aperture and a very fast F2.8 focal ratio. Aluminum tube version.

The Sharpstar 13028HNT-AL is a hyperbolic Newtonian reflector with a 130mm aperture and a fast F2.8 focal ratio.

Sharpstar 13028HNT-AL supports a 44mm full-frame image circle, and the star performance is great.

The primary mirror is made of Pyrex-alike glass PZ33. The thermal expansion coefficient is smaller than ordinary glass. The dielectric multilayer coating gives the primary mirror a highly reflective ability of up to 97%. The minor axis of the secondary mirror is 65mm, enabling sufficient illumination for full-frame imaging.

The corrector in the focuser adopts a doublet lens design, one of which is an ED glass, enhancing the power in aberration correction.

Sharpstar 13028HNT-AL further enhances 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 the angle of the primary mirror.

13028HNT-AL improves the bracket structure of the secondary mirror to make it more stable. The secondary mirror bracket is CNC machined, integrated manufacturing with no misalignment, which ensures beautiful diffraction spikes during astrophotography.

There is a finder base on the side of the lens tube, which provides additional mounting positions for finder scope or other astronomical accessories.

13028HNT-AL's tube ring is a hollow design, sturdy and durable. Enlarged hand screws allow users to open and close the tube ring without additional tools.

Sharpstar 13028HNT-AL's focuser is a dual-speed rack-and-pinion large rigid focuser, which ensures a 2cm focusing travel as much as possible within the structural limitations and can be compatible with most motorized focusers.

The 13028HNT-AL is a hyperbolic Newtonian reflector with a 130mm aperture and a fast F2.8 focal ratio.

Sharpstar 13028HNT-AL supports a 44mm full-frame image circle, and the star performance is great.

The primary mirror is made of Pyrex-alike glass PZ33. The thermal expansion coefficient is smaller than ordinary glass. The dielectric multilayer coating gives the primary mirror a highly reflective ability of up to 97%. The minor axis of the secondary mirror is 65mm, enabling sufficient illumination for full-frame imaging.

The corrector in the focuser adopts a doublet lens design, one of which is an ED glass, enhancing the power in aberration correction.

Sharpstar 13028HNT-AL further enhances 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 the angle of the primary mirror.

13028HNT-AL improves the bracket structure of the secondary mirror to make it more stable. The secondary mirror bracket is CNC machined, integrated manufacturing with no misalignment, which ensures beautiful diffraction spikes during astrophotography.

There is a finder base on the side of the lens tube, which provides additional mounting positions for finder scope or other astronomical accessories.

Sharpstar 13028HNT-AL's tube ring is a hollow design, sturdy and durable. Enlarged hand screws allow users to open and close the tube ring without additional tools.

13028HNT-AL's focuser is a dual-speed rack-and-pinion large rigid focuser, which ensures a 2cm focusing travel as much as possible within the structural limitations and can be 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 back focus of 13028HNT-AL is standard 55mm (from the M48 thread).

Standard Vixen-style 290mm dovetail plate are included. Sharpstar 13028HNT-AL is all-metal, with an aluminum lens tube and CNC machined parts.

* The 13028HNT-AL focuser and rotator are shipped in a locked condition. Users should be sure to loosen the locking screws before initial use to avoid damage to the part.

Specifications

Sharpstar 13028HNT-AL

Aperture size

130mm

Focal length

364mm

Focal ratio

f/2.8

Primary mirror type

Hyperbolic reflective mirror

Primary mirror material

PZ33 (similar to Pyrex glass)

Corrector

Two-element air-spaced refractive lenses (including one ED glass)

Minor axis of secondary mirror

65mm

Image circle

44mm

Field of view

6.9 degree

Main tube material

Aluminum

Main tube outer diameter

174mm

Main tube length

400mm

OTA weight

3.8kg

Gross weight (including tube ring and dovetail plate)

4.8kg

Resolution

0.89 arc second

Limiting visual magnitude

12.3

Back-focus

55mm

Telescope System
Optical Tube Only (OTA)
Telescope type
Astrograph
Telescope Aperture (mm)
130mm
Telescope Focal Length (mm)
364mm
Telescope Focal Ratio (F)
F2.8

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Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA

Sharpstar 13028HNT-AL 130mm F2.8 Hyperbolic Newtonian Astrograph - Aluminium OTA

Sharpstar 15028HNT-AL 150mm F2.8 Hyperbolic Newtonian Astrograph

  • Aperture size: 130mm
  • Focal length: 364mm
  • Focal ratio: 2.8
  • Corrector: three-element air-spaced lens (one ED element)
  • Image circle: 44mm
  • Field of view: 6.9 degree
  • Tube material: aluminium
  • Net weight:3.8kg
  • Gross weight: 4.8kg (including tube rings, handle and Losmandy-style dovetail plate)
  • Focuser: 2.5" with fine adjustment
  • Back focus: 55mm

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