Manufacturer: Askar Sharpstar
Product number: Hypergraph6

EUR 2.299,00RRP EUR 2.599,00you save 11.5% (EUR 300,00)


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Sharpstar hyperboloid Astrograph with 150 mm Aperture and f/2.8
These astrographs are perfectly tailored to the modern demands of the digital astrophotography. In opposite to simple Newtonian telescopes with coma corrector, the TS Hypergraphs have a hyperbolic primary mirrror and an especially designed corrector in the focuser. With this, a perfectly corrected image circle of 45 mm diameter is obtained, with space-optimised design and a moderate secondary mirror with 70 mm diameter. At the same time the image quality is so high that even modern astro-cameras with very high resolution can be used.

The advantages and features of the TS Hypergraphs at a glance:
Optics optimised for astrophotography, with high resolution over the entire useable image field.
Carbon tube for a significantly better focus stability than with a metal tube. Refocusing after temperature changes can be omitted. The images become sharper.
Secondary mirror is installed with the necessary offset, the illumination of the field is more even.
Despite the extreme focal ratio the telescope is well to collimate and it keeps collimation well even during transport.
Micro focusing is already built-in, this is necessary with the extreme focal ratio of f/2.8
High-quality CNC tube rings and a Losmandy style dovetail bar are included in the scope of delivery
Carry handle with support area for a finder shoe
Easy camera adaption via the M48x0,75 connection thread of the focuser. The working distance is 55 mm.


Easy camera connection via the thread of the focuser
When dealing with such a highly resolving and fast optics, a threaded connection of the camera is necessary. In this way, tilting and therefore unsharp stars at the edge are avoided.

The 2.5" R&P focuser has, besides the female M63x0.75 thread, a male M48x0.75 thread. The working distance from this thread is perfectly 55 mm. This matches, for example, exactly the distance which a SLR camera and the matching T-adapter need. Even astro cameras, like the ones from ZWO, are already supplied with an adapter kit to M48 which takes account of exactly this distance.

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.


Manuals
There is a PDF guide for collimation, you can download it here.
In addition, the instructions for collimating the similar Hypergraph130 are available as a PDF.

Product video
There is a product video for the hyperbolic astrographs:



Astrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model: Link to Astrobin
Type:Hyperbolic flat-field astrograph with corrector
Aperture:150 mm
Focal length:420 mm
Focal ratio:f/2.8
Image circle:45 mm diameter with optimum correction
Secondary mirror diameter:70 mm
Camera connection:M63x0.75 thread (female) / M48x0.75 thread (male)
Working distance:55 mm from the male M48x0.75 thread
Eyepiece connection:1.25" via the adapter
Tube material:Carbon
Tube diameter:195 mm
Tube length:450 mm
Weight:5 kg incl. tube rings
External dimensions of transport case:59 x 34 x 28 cm
Weight of case:4.95 kg
Optical tube
CNC tube rings with Losmandy style dovetail bar
Handle
1.25" eyepiece adapter
Hex allen keys for collimation
Dust caps
Transport case

Astrophotographic results obtained with this telescope on Astrobin
Here you can find some astrophotographs made with this telescope model: Link to Astrobin

Imaging test with the telescope
Our customer Torsten Müller has taken some photographs with this telescope, which are rather tests due to the weather situation at the time of taking the picture and the partly incomplete setting of the corrector distance, but they are so good that they clearly show the quality of the telescope:

Object: California Nebula (NGC 1499)
Photographer: Torsten Müller
Telescope TS Hypergraph6 on Sky-Watcher EQ8
Filter: Optolong L-Pro
Camera: ZWO ASI2400MC Pro
Exposure time: 20x 4 min


Object: Triangulum Nebula (M 33)
Photographer: Torsten Müller
Telescope TS Hypergraph6 on Sky-Watcher AZ-EQ5
Filter combination: Baader L-RGB CCD
Camera: ZWO ASI1600MM Pro
Exposure time: 24x 3 min


Object: IC 417 ("Spider", center left) and NGC 1931 ("Fly", center right)
Other objects: Cluster on the right is M 36, below is M38, nebula on the left is IC 410.
Photographer: Torsten Müller
Telescope TS Hypergraph6 on Sky-Watcher EQ8
Filter: Optolong L-Pro
Camera: ZWO ASI2400MC Pro
Exposure time: 8x 5 min

Many Thanks to Torsten Müller for these lovely images!

Question:
How can I attach the ZWO EAF to the focuser??

Answer from Teleskop-Service:
The EAF is attached via the clamping screw which blocks the adjustment of the focuser. No additional adapter is necessary.


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Reviews

Written by Janos Barabas
on 2019-12-25

"I am very happy with the instrument, high quality optics and mechanics !"