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Hyperstar 9.25 v4

Hyperstar 9.25 v4
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Price:  £1,199.00
List Price:  £1,299.00
(Inc. 20% VAT)
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Product Code:  HS3-C925
Manufacturer:  Starizona


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Ultra-fast, wide-field CCD imaging has never been easier. HyperStar quickly converts your SCT into a fast imaging system. The HyperStar lens easily replaces the secondary mirror in the telescope, allowing a camera to be placed in front of the telescope. Switching between HyperStar and standard configurations is quick and simple--no tools required.

Features
The HyperStar 9.25 lens converts a standard Celestron 9.25" SCT from f/10 to f/2.2, making the system 25 times faster. That means 25-times shorter exposures! Now you can capture deep-sky images without guiding and without an equatorial wedge (in alt-az configuration). The HyperStar lens shortens the focal length of the telescope, giving a much wider field of view, and giving a greater tolerance of tracking errors, allowing for unguided, alt-az imaging.
The HyperStar 9.25 is compatible with a variety of cameras, including CCD, CMOS and DSLRs. The HyperStar 9.25 covers up to a 28mm sensor size. Separate adapters are required for different cameras. One adapter is included with the HyperStar lens.

Optical performance is excellent, with a coma-free, flat field of view up to 3 degrees wide.

HyperStar Version Comparison

FAQs 

Do I need the Filter Slider to use Filters with the HyperStar?
No, the standard camera adapter that comes with the HyperStar allows the use of one 2” mounted filter. This is ideal for light pollution or IR/Cut filters when using a one-shot color camera. Although, the Filter Slider is ideal for quick filter changes when using a monochrome camera.

Are HyperStars hard to focus?
HyperStars are no more difficult to focus than any other optical system. HyperStars can be accurately focused with Bahtinov Masks, AutoFocusers (ie MicroTouch Autofocuser), and any software that displays a Full-Width Half-Max star value. Although, the fast F/Ratio does make the camera’s backfocus much more critical. This is why the HyperStar camera adapters need to be precisely within +- .5mm of the camera’s backfocus.

Why do I need to specify my mount type?
We ask for the mount type to determine if you’ll need a counterweight shipped with your HyperStar or not. GEM mounts can accommodate the balance of the HyperStar by shifting the scope forward or backward on the mount, whereas Fork Mounted telescopes can’t move on the mount and require a counterweight.

What telescopes are compatible?
Factory-equipped Fastar-compatible 9.25" SCT telescopes have a removable secondary mirror assembly, allowing the use of the HyperStar C9.25 lens. Older 9.25" SCTs are NOT compatible, nor can they be converted.

Why are the other HyperStar lenses faster?
The 9.25" SCT uses a slightly different optical configuration, in order to produce a flatter field of view and have a smaller central obstruction. This means it uses a slower primary mirror (f/2.2 versus the f/2 mirror in other SCTs). This means the HyperStar has to be slightly slower to retain its excellent optical performance. The difference between f/2.2 and f/2 is negligible.

HyperStar C9.25 Fork-Mounted OTA Instructions

HyperStar C9.25 German EQ-Mounted OTA Instructions

Specifications

  • Focal Ratio: f/2.3
  • Focal Length: 540mm
  • Maximum Usable Sensor Size: 27mm Diagonal (APS Format)
  • Field of View (with 27mm sensor): 2.8 degrees
  • DSLR Compatible
  • Camera Adapter Threaded for 2" (48mm) Filters
  • Backfocus (from mounting thread to focal plane): 59.7mm (2.35")
  • Length (without camera adapter): 4.2"
  • Diameter: 4.1"
  • Weight: 1.8 lbs.

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