SHARPSTAR Unveils New Telescopes for Astrophotography
On April 25, 2025, Sightron Japan Inc., based in Shinjuku, Tokyo, will launch two new telescopes from its renowned brand SHARPSTAR: the 13028HNT-AL and 15028HNT-AL models, designed specifically for astro enthusiasts and photographers.
Exceptional Features of New Telescopes
Both models share outstanding features geared towards stunning celestial imagery, utilizing advanced optical configurations that include hyperbolic mirrors and specialized corrective lenses.
Common Characteristics
- - F2.8 Optical System: The dual-hyperbolic mirrors employed in both models create an impressive F2.8 optical system that allows for bright astrophotography, significantly reducing noise levels, which permits shorter exposure times. This is particularly beneficial for capturing images within limited time constraints during expeditions.
- - Mirror Coating: A high-reflectivity dielectric coating (97%) is applied to the primary mirror, greatly minimizing light loss for improved image brightness.
- - Camera Compatibility: The M48×P0.75mm camera connection supports a back focus of 55mm and accommodates full-frame image circles, ensuring seamless integration with your imaging equipment.
Robust Optical System
- - The innovative design of the secondary mirror's spider, manufactured through CNC machining, ensures a sturdy build that minimizes distortion and misalignment during transport and shooting.
- - Both telescopes feature lightweight yet durable aluminum tubes and metal rings on the front to stabilize the mirrors and maintain clear star images by reducing halo effects around bright stars.
- - Crafted from high-stability PZ33 borosilicate glass, the primary mirrors resist thermal distortion, ensuring excellent performance across varying temperatures.
- - Users can also benefit from removable corrective lenses for precise focus adjustments and collimation, providing a hassle-free experience.
Model-Specific Features
13028HNT-AL
- - Specifications: Offers an aperture of 130mm, a focal length of 364mm, and an F2.8 ratio. It includes two groups of corrective lenses featuring one ED lens, providing versatility in capture capabilities.
- - Field Rotation Mechanism: Integrated into the drawtube, this allows users to rotate the camera separately, facilitating composition adjustments while maintaining focus.
- - Dual-Speed Focuser: The robust rack-and-pinion dual-speed focuser supports loads up to 3kg, making it capable of accommodating various equipment, including cooling CMOS cameras and filter wheels.
15028HNT-AL
- - Specifications: With a larger aperture of 150mm and a focal length of 420mm at an F2.8 ratio, this model caters to those desiring more expansive views. The construction incorporates three groups of corrective lenses, including an ED lens, for outstanding clarity.
- - A standard rotation mechanism on the focuser facilitates easy adjustments for optimal composition.
- - Like its counterpart, this model also features a dual-speed focuser suitable for loads up to 3kg, greatly enhancing stability during usage.
Marketing Announcement and Promotions
Pricing and Availability
- - 13028HNT-AL: Expected market price around JPY 330,000 (tax included)
- - 15028HNT-AL: Expected market price around JPY 400,000 (tax included)
These telescopes will be exclusively available in specialty astronomy stores and Sightron Japan's direct retailers.
Gift Campaign
The first customers who purchase either the 13028HNT-AL or 15028HNT-AL will receive a limited-edition SHARPSTAR original cap (not for sale). This promotion is valid until supplies last and restricted to one item per customer.
For further inquiries about the products:
Sightron Japan Inc.
Customer Service: +81 3-6908-3116
Founded in 1961, Sightron specializes in optical products, including binoculars and telescopes, and is dedicated to advancing astronomical observations and events throughout Japan. For more information, you can visit
Sightron Japan's official website.