Sharpstar hyperboloid astrograph with 150 mm f/2.8 aperture
Sharpstar Hyperboloid Astrograph with 130 mm aperture and f/2.8
With the 1302.8HNT Hypergraph 130, Sharpstar has created a telescope for mobile astrophotography. With a tube length of less than 40 centimeters, the "little" Hypergraph even fits in airline luggage. In the sky, however, the performance is remarkable. The fast focal ratio of f/2.8 allows you to properly expose an object in just one night, or even focus on multiple objects.
The 2-element corrector offers very good field correction with full illumination beyond the APS-C format. With an apartment, you can even use full-frame cameras.
The working distance of 55 mm from the M48 thread on the focuser allows easy adaptation from all common astronomical cameras, DSLRs and also system cameras.
The advantages and features of hypergraphs TS at a glance:
♦ Optimized optics for astrophotography with high resolution over the entire usable image field.
♦ Carbon tube for much better focusing stability than a metal tube. No need to readjust focus when temperature changes. Images are sharper.
♦ Secondary mirror is integrated with the necessary offset, image field illumination is more uniform.
♦ Despite the extreme focal ratio, the telescope collimates well and maintains collimation well during transport.
♦ The focuser has been further improved and now allows even better focusing. It holds the focus position perfectly even over a longer period of time.
♦ Dual-speed focusing is now built-in, which is also necessary with the extreme focal ratio of f/2.8.
♦ High quality CNC tube rings and a GP/EQ5 style dovetail bar are included.
♦ Carrying handle with mounting surface for finder shoe
♦ Easy adaptation to the camera via the M48x0.75 connection thread of the focuser. Working distance is 55 mm.
Easy camera adaptation via focuser thread
With such a high resolution and fast optics, a screwed camera adaptation is necessary. This prevents tilting and thus blurred stars at the edge.
The 2.5" R&P focuser has an M48x0.75 male thread in addition to the M63x0.75 female thread. The working distance from this thread is exactly 55 mm. This corresponds, for example, exactly to the distance required by an SLR camera and the matching T-adapter. Astro cameras, such as those from ZWO, are also supplied with an M48 adapter kit, which takes exactly this distance into account.
Practical tip:
The Hypergraph convinces with its short design. For incident light, such as flashlights and similar stray light, it makes sense to use a flexible spray shield. A good spray shield not only reduces the risk of spray, but also prevents stray light from entering the tube. This also improves image contrast.
Design: hyperbolic flat field astrograph with corrector
Aperture: 130mm
Focal length: 364mm
Focal ratio: f/2.8
Image circle: 40 mm diameter with optimal correction
Camera mount: M54x1 female thread / M48x0.75
Working distance: 55 mm from male thread M48x0.75
Eyepiece connection: 1.25" via adapter
Tube material: Carbon
Tube length: 390 mm
Weight: 4 kg incl. clamps
Sharpstar hyperboloid astrograph with 150 mm aperture and f/2.8
