Istar Perseus AT 150mm R35 F/8 Refractor

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Istar Perseus AT 150mm R35 F/8 Refractor

Regular Price: $2,289.00

Special Price $1,650.00

Item # IS-AT150-8
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  • The Istar Perseus AT 150mm F/8 Refractor OTA is an Achromatic Doublet.
  • The two element design features full multi-coatings.
  • The Istar Optical Perseus AT 150mm F/8 Refractor OTA has a lens diameter of 154mm with a full 6" of clear aperture.
  • Short focal ratio of f/8 and overall length of 1200mm.
  • This Istar refractor comes with a 2.5" dual speed, fully rotatable rack & pinion DDG focuser from William Optics and include 2" & 1.25" brass compression ring adapters.
  • Contact OPT via phone, email, or chat to see if we have one of these telescopes waiting in the wings for you!
  • Please note the Istar Perseus AT 150mm Refractor is only available in white. Images depict an older version.


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" 360 degree rotatable rack & pinion focuser from William Optics to finish off your telescope in style. This focuser features two locking screws at angled positions for heavy payload operations as well as a luxuriously smooth dual speed microfocuser, Digital Display Gauge (DDG), 2" to 1.25" adapter, and a thermometer integrated into the focuser knob! Draw tube travel is 3.1" and the whole thing weighs only 3.3 lbs.

Istar Optical Perseus AT 150mm F/8 Refractor Telescope Features

  • Type: Achromatic Doublet
  • Number of Elements: 2
  • Lens Diameter: 154 mm
  • Clear Aperture: 150 mm (6 inches)
  • Focal Length: 1200mm
  • Focal Ratio: f/8
  • Lens Coating: Full Multi-Coated
  • OTA Weight: 11.73 kg (25.8 lbs.)
Istar Optical Product Number: AT150-8
Additional Information

Additional Information

SKU IS-AT150-8
Manufacturer Istar
Telescope Series iStar Perseus
Optical Design Refractor - Achromatic
Mount Type None - Optical Tube Only
Warranty 5 Year Warranty
Telescope Aperture 6"
Telescope Focal Length 1200mm
Telescope Focal Ratio f/8
Optical Coatings Fully Multi-Coated
Dew Shield Included? Yes
Optical Tube Weight 25.8 lbs.
Length of Optical Tube 1195mm
Tube Color or Finish Matte Black
OTA Mount Type N/A
Diagonal Included? No - Sold Separately
Focuser Size 2.5"
Focuser Style Rack & Pinion
Focusing Speeds Two-Speed
Finder Included None
Eyepiece(s) Included None
Included Items

Included Items

  • Istar Perseus AT 150mm F/8 Refractor
  • Special Lens Cap
  • 2" Adapter
  • 1.25" Adapter
  • Interferometer Test Results
  • Visual Test Results
  • William Optics 2.5" Rack & Pinion Focuser w/ DDG
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