Istar Optical Refractor Highlights
Unlike so many mass-produced telescopes on the market today, refractors from Istar Optical are created one at a time and then strenuously tested to insure the best quality possible. The optics are manufactured with glass from brand name companies like O'Hara, Schott, and CDGM.
Each Istar lens is produced with a super flat black-edge masking that eliminates unwanted inner objective glass reflections while improving on resolution. Once completed, all IStar lenses are tested twice. A computer interferometer test is done as well as a full visual test out under the stars. Every lens is engraved with its own serial number, and that number is linked to its set of reports, which are sent to the buyer along with warranty information (5 years).
A special lens cap is shipped with each telescope that will allow the user to increase or decrease the friction inside of the dew shield by simply loosening or tightening two silver bolts. It is unlike anything else on the market today.
The optical tube assembly and dew shield for each iStar telescope are produced in Austria and then CNC machined and powder coated in the Czech Republic. The finish of choice is matte black. The textured finish is durable and allows for a sure grip when handling the tube.
Finally, Istar provides a 2.5" dual speed, 360 rotatable focuser to finish off your telescope in style. The focuser is CNC machined of aircraft grade alloy, and the included 2" & 1.25" adapters have brass compression rings. The draw tube travel is 4.5", and the whole thing weighs 3.2 lbs.
Istar Optical Phoenix WXT 204mm F/6 Wide Field Refractor Telescope Features
- Type: Achromatic Doublet
- Number of Elements: 2
- Lens Diameter: 210 mm
- Clear Aperture: 204 mm (8 inches)
- Focal Length: 1200mm
- Focal Ratio: f/5.9
- Lens Coating: Fully Multi-Coated
- OTA Length: 1220 mm (incl. dew shield)
Istar Optical Product Number: WXT204-6
Note: Shown with optional accessories.
- Additional Information
SKU IS-WXT204-6 Manufacturer Istar Telescope Series iStar Phoenix Optical Design Refractor - Achromatic Mount Type None - Optical Tube Only Warranty 5 Year Warranty Telescope Aperture 8" Telescope Focal Length 1200mm Telescope Focal Ratio f/5.9 Optical Coatings Fully Multi-Coated Dew Shield Included? Yes Length of Optical Tube 1220mm Tube Color or Finish Gloss White OTA Mount Type N/A Diagonal Included? No - Sold Separately Focuser Size 2.5" Focuser Style Crayford Focusing Speeds Two-Speed Finder Included None
- Included Items
- Istar Phoenix WXT 204mm F/5.9 Wide Field Refractor
- Special Lens Cap
- 2.5" Dual Speed Crayford Focuser
- 2" Adapter
- 1.25" Adapter
- Interferometer Test Results
- Visual Test Results
- Questions & Answers
Product QuestionsHow wide is the field of view with typical eyepieces and how does it compare to other refractors of similar aperture?Question by: Don Philley on May 18, 2016 6:48:00 PMThe f/6 focal ratio is very wide for a 204mm size refractor, as most refractors that size are f/9 or longer. The focal length of this scope is 1224mm, while a typical 8" class refractor will have a focal length of at least 1800mm+, so the magnifications are 33% lower and TFOV's 50% wider than with an f/9 variant.Answer by: Chris Hendren (Admin) on May 19, 2016 10:57:00 AMQuestion by: James S. McEvoy on Apr 10, 2016 4:04:00 PMThe Phoenix WXT 204 weighs just shy of 30 pounds, without rings or dovetail. iStar does offer both the tube-rings and dovetail (vixen-style) as optional accessories, but Losmandy or ADM D-series Universal Plates can be used with the iStar rings.Answer by: Eric Blackhurst (Admin) on Apr 11, 2016 5:20:00 PM
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