Sharpstar 130 mm f/2.8 Hyperbolic Astrograph

Codice articolo: Hypergraph130

Hyperbolic flat-field astrograph from Sharpstar with 130 mm aperture and fast f/2.8 focal ratio from Teleskop-Service

♦ Aperture 130 mm / focal length 364 mm / focal ratio f/2.8

♦ Optimally suited for mobile astrophotography with modern, high-resolution digital cameras

♦ Ideal for cameras up to APS-C and with Flat even up to full-frame sensors

♦ Hyperbolic primary mirror with 130 mm diameter

♦ 2-element corrector with one ED element

♦ Modern dual-speed 2.5" rack and pinion focuser

♦ Working distance from M48x0.75 camera thread is 55 mm - Working distance from M54x1 female thread is 57.2 mm

♦ 2" filter thread for connecting fog filters is included in the reduction adapter to M48

♦ Carbon tube for optimal hold of focus position - provides better focus stability than a metal tube

♦ Stable metal secondary mount with adjustment screws

♦ Primary mirror collimation with tension and compression screws

♦ Included in delivery are a carrying case, CNC tube rings and an EQ5-style dovetail bar

♦ Each Hypergraph is checked, cleaned and adjusted at Teleskop-Service.

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 "small" Hypergraph even fits into airline luggage. On 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 APS-C format. With a flat, you can even use full-frame cameras.

The working distance of 55 mm from the M48 thread on the focuser allows easy adaption from all common astro cameras, DSLR and also system cameras.

The advantages and features of the TS hypergraphs at a glance:

♦ Optics optimized for astrophotography with high resolution over the entire usable image field.
♦ Carbon tube for much better focus stability than a metal tube. No need to readjust focus when temperature changes. Images are sharper.
♦ Secondary mirror is built in with the necessary offset, the illumination of the image field is more uniform.
♦ Despite the extreme focal ratio, the telescope collimates well and it holds 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 already 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 camera adaption via the M48x0.75 connection thread of the focuser. The working distance is 55 mm.

Simple camera adaption via the screw thread of the focuser

With such a high resolution and fast optics, a screwed adaption of the camera is necessary. This prevents tilting and thus blurred stars at the edge.

The 2.5" R&P focuser has a 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 already supplied with an adapter kit to M48, which takes exactly this distance into account.

Practical tip from Teleskop-Service:

The Hypergraph convinces by its short design. For incident light, such as lanterns and similar stray light, it makes sense to use a flexible dew shield. A good dew shield not only reduces the risk of dew, it also prevents stray light from entering the tube. This also improves the contrast of the image.