13028HNT

Sharpstar takes the initiative in launching the very first 150mm hyperbolic Newtonian reflective telescope with an extremely-fast focal ratio of f/2.8(15028HNT). It has garnered a quite large following since its advent. Not indulging in this great achievement, Sharpstar keeps the creativity and dynamism, introducing 13028HNT to our customers, which has a same focal ratio but a slightly smaller aperture size. 13028HNT, with a hyperbolic primary mirror, produces round and sharp stars within the full-frame and supports 44mm image circle. Compared with the focal ratio of f/4, 13028HNT can attain the same image quality while save almost half of the exposure time. Besides, due to its compact and concise design of the telescope tube, it will certainly create a stir again in the market.

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Product introduction

Sharpstar takes the initiative in launching the very first 150mm hyperbolic Newtonian reflective telescope with an extremely-fast focal ratio of f/2.8(15028HNT). It has garnered a quite large following since its advent. Not indulging in this great achievement, Sharpstar keeps the creativity and dynamism, introducing 13028HNT to our customers, which has a same focal ratio but a slightly smaller aperture size. 13028HNT, with a hyperbolic primary mirror, produces round and sharp stars within the full-frame and supports 44mm image circle. Compared with the focal  ratio of f/4, 13028HNT can attain the same image quality while save almost half of the exposure time. Besides, due to its compact and concise design of the telescope tube, it will certainly create a stir again in the market.

 

The primary mirror is made of Pyrex-alike glass PZ33. The thermal expansion coefficient is smaller than ordinary glass. The dielectric multilayer coating makes the primary mirror obtain a highly reflective ability up to 97%. The minor axis of the secondary mirror is 65mm, enabling sufficient illumination for full-frame imaging. It’s worth mentioning that, the corrector is renovated to a two-refractive-lens set, one of which is an ED glass, aiming to simplify the optical system while enhancing the power in aberration correction.

 

The telescope tube is totally made of high-end carbon fiber material, so the weight of the telescope can greatly lessen and the overall appearance may artistically build up. All the component parts are from CNC constructed metals. The pair of tube rings feature pierced design. It may increase the production cost, but will absolutely offer extraordinary customer experience because of its lightweight and detail-oriented design concept.

 

The focuser is a 2.5" rack-and-pinion device. It’s equipped with coarse as well as fine adjustment hand knobs to further improve the focusing precision. The focuser is tapped with M63 thread which can be switched into a more general M48×0.75 thread with a proper adapter ring(included). Thus the users may have a wider range of options in connecting other astronomy accessories to the focuser. The back-focus is standard 55mm(starting from the base of the mounting thread on the adapter ring’s housing), which is user-friendly for newcomers.

 

A versatile handle and a standard Vixen-style dovetail plate are also included in the 13028HNT package, which may be of convenience for users to attach other potential accessories and to place the telescope on various equatorial mounts.

Specifications

13028HNT

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

High-end carbon fiber

Main tube outer diameter

174mm

Main tube length

394mm

Net weight

3.2kg

Gross weight

4.3kg(including protective cap, tube rings, handle and vixen dovetail plate)

Resolution

0.89 arc second

Focuser

2.5" with fine-adjustment-end carbon fiber

Limiting visual magnitude

12.3

Back-focus

55mm

 

 

Video

Images

 Wang Yan     |     Cygnus     |     Sharpstar 13028HNT

 

 ZhuLiQun     |     M42     |     Sharpstar 13028HNT

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