Askar 151PHQ apochromatic bezel

Askar 151PHQ Astrographic Telescope

The Askar 151PHQ is the benchmark in long-focus astrographs, specially designed for passionate and demanding astrophotographers. With its unique design, this telescope features an integrated flat field, eliminating the need for additional accessories such as field correctors or backfocus calculators. Simplify your equipment while obtaining outstanding, astrophotography-ready images.

Why choose Askar 151PHQ?

With an aperture of 151mm and a focal length of 1057mm with an f/7 ratio, the 151PHQ is one of the largest and most powerful refractors in the Askar range. It features a quadruplet lens with two ED glass elements, guaranteeing excellent correction of chromatic aberrations and minimal distortion of stars at the edge of the field. The 60mm field of view enables perfectly sharp images to be captured, even on large sensors, with a central RMS radius of less than 2 microns for unrivalled precision.

Highlights

• Ease of use : Thanks to its integrated flat-field design, there's no need to calculate backfocus distance or make complex connections. Simply plug in your capture equipment and benefit from an optimized optical system for precise shots without additional adjustment.
• Optical quality : ED glass elements ensure high light transmission and excellent aberration control, for bright, artifact-free images.
• Versatility : The R&P 3.4" focuser with multiple adapters (M68/M54/M48), 360° rotator and finder base offers great configuration flexibility. Used with a 3" field reducer at 0.7×, the 151PHQ achieves a focal ratio of f/4.9 and a reduced focal length of 740mm, ideal for reducing exposure time.
• Robustness and design : Made from high-quality CNC aluminum, the 151PHQ is as much a precision tool as a beautiful object. Its rigid, hard-wearing tube is complemented by a telescopic mist guard and meticulous design.

Key Technical Specifications

• Opening: 151mm
• Focal length: 1057mm (reducible to 740mm with a reducer)
• Focal ratio: f/7 (f/4.9 with gearbox)
• Lens: Quadruplet APO with two ED elements
• Image circle diameter: 60mm
• Total length :
  • Observation mode: 930.3mm (mist screen retracted) to 1117.8mm (mist screen extended)
  • Imaging mode: 976.8mm (mist screen retracted) to 1164.3mm (mist screen extended)
• Weight (OTA): 11.6kg
• Total weight (with Losmandy rings and plate): 13.7kg
• Rear thread type: Several options (M86, M68, M54, M48)
• Photographic end adapter: M48×0.75
• Standard accessories: 151PHQ OTA tube, pair of rings, handle, 300mm Losmandy plate, photographic adapters, aluminum case, manual.

What you get

• Askar 151PHQ high-precision OTA tube
• Pair of rings for secure, stable attachment
• Multifunctional handle with M6 screw slot
• 300mm Losmandy plate for optimum frame compatibility
• Photographic adapters (4 pieces) for maximum flexibility
• Aluminum case for secure transport
• Comprehensive user manual for easy start-up