Sharpstar 13028HNT 130 mm f/2.8 Hyperbolic Astrograph OFFER- with 32 mm Guidescope

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 use of all common astro cameras, DSLR and also mirrorless 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.

 

Astrophotographic results obtained with this telescope on Astrobin

Here you can find some astrophotographs made with this telescope model: Link to Astrobin
 

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.
 

This is how we hand over the hypergraph to the star friend:

The hypergraphs must undergo a complete optimization and check at Teleskop-Service after transport. We have to invest several hours of time in each telescope, only in this way you will get an operational telescope. The individual steps are:

Removal of the main mirror cell and tightening of all screws, as they are usually loose.

Optimizing the fit of the main mirror in the cell - not too tight and not too loose.

Cleaning the main mirror and the inside of the tube.

Checking and optimization of the focuser

Collimation of the whole system and check of the collimation stability

Creation of the manufacturing protocol and preparation for shipment.

Design:	Hyperbolic flat-field astrograph with corrector
Aperture:	130 mm
Focal length:	364 mm
Focal ratio:	f/2.8
Image circle:	40 mm diameter at optimal correction
Camera mount:	M54x1 female thread / M48x0.75 male thread
Working distance:	55 mm from M48x0.75 male thread
Eyepiece connection:	1.25" via adapter
Tube material:	Carbon
Tube length:	394 mm
Tube diameter:	174 mm (182 mm at tube end rings)
Weight:	4.3 kg incl. tube rings, dovtail rail etc.

Optical tube assemply

CNC tube rings with GP/EQ5 style dovetail bar

Carrying handle

1.25" eyepiece adapter

Dust caps

Allen wrench for adjustment

Sharpstar collimation eyepiece

Carrying case