Brand: SharpStar

SharpStar 13028HNT-AL Hyperbolic Newtonian Reflector (13028HNT-AL)

13028HNT-AL

Brand: SharpStar

SharpStar 13028HNT-AL Hyperbolic Newtonian Reflector (13028HNT-AL)

13028HNT-AL

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-AT can attain the same image quality while save almost half of the exposure time.
Special Order
$1,795.00 USD

Easy Payment Options with .

How do I Special Order?
Special Order
$1,795.00 USD

Easy Payment Options with .

How do I Special Order?
Free Expert Support
Stress Free, Secure Shopping
30 Day Return Policy
Price Match Promise
Full Details What Can I See? What's in the Box? Specifications Reviews and Questions Articles, Videos, Software, Links

Product Description

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

December 2024 Update: This Telescope has been been Updated!

The new 13028HNT-AL is all-metal, with an aluminum lens tube and CNC machined parts.

  • 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.
  • 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.

13028HNT-AL Focuser

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).

Includes a standard Vixen-style 290mm dovetail plate.

Note: 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.

13028HNT-AL Parts

What can I see with a SharpStar 13028HNT-AL Hyperbolic Newtonian Reflector (13028HNT-AL)?

Here are some simulated views of common objects. Results with your telescope will vary with viewing conditions, obrits, equipment and more.

Jupiter with

25mm Eyepiece - 15x Magnification

(Sold Separately)

Jupiter with

10mm Eyepiece - 36x Magnification

Sold Separately

Jupiter with

5mm Eyepiece - 73x Magnification

Sold Separately

Moon with 25mm Eyepiece

15x Magnification

(Sold Separately)

Moon with 10mm Eyepiece

36x Magnification

Sold Separately

Moon with 5mm Eyepiece

73x Magnification

Sold Separately

Andromeda with 36mm Eyepiece

10x Magnification

Sold Separately

Andromeda with 25mm Eyepiece

15x Magnification

(Sold Separately)

Andromeda with 10mm Eyepiece

36x Magnification

Sold Separately

What's in the Box

  • Optical Tube Assembly
  • Protective cap
  • Tube rings
  • Dovetail plate
  • Handle

Specifications

Aperture 130mm
Focal length of primary mirror 364mm
Focal ratio of primary mirror 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 4.8kg (including protective cap, tube rings, handle and Losmandy-style dovetail plate)
Resolution 0.89 arc second
Limiting visual magnitude 12.3
Back focus 55mm

13028HNT-AL Dimensions

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Why Should You Trust All Star Telescope?

We've Made All The Mistakes
So You Don't Have To

Learn More