Telescope-Astrographs-Askar 65PHQ Quintuplet Refracting Astrograph

The Askar 65PHQ: A Versatile, Compact, Apochromatic Quintuplet Refractor

The 65PHQ is the smallest and most lightweight in the PHQ series of refracting astrographs from Askar. The lens arrangement of this refractor is in a quintuplet, 3+2, air-spaced configuration. Two of the front lenses are made with extra-low dispersion (ED) glass to reduce chromatic and other aberrations and enhance clarity and sharpness.

The aperture of this astrograph is 65 mm, with a focal length of 416 mm, yielding a focal ratio of f/6.4. In addition, this refractor supports a full frame, 44 mm image circle. Check out the video below!

The 65PHQ is a versatile, all-around imaging and optical refractor perfect for the beginner or amateur! Instead of needing additional flatteners or calculating back focus or other adjustments, simply attach a camera and focus on the target.

As with the other scopes in the PHQ line, there is no need to calculate backfocus, nor is there a need for an additional field flattener, as the optical design ensures a flat field.

Impressive Specifications at an Affordable Price

This small but effective apochromatic quintuplet refractor packs a punch! In addition to its quintuplet design, the 65PHQ includes a large, 2.5″ rack-and-pinion 10:1 fine-tune focuser with a 360° rotator to allow precise orientation of any attached cameras or accessories. The optical tube includes a retractable lens hood and comes with two tube rings, a multifunction carrying handle, 300 mm dovetail plate, and three adapters to mount a camera or other accessories. Lastly, all of this comes in at just over 6 pounds!

Quintuplet Lens Design
The optical design of this 65 mm aperture refractor is a quintuplet, with a 3+2 lens arrangement. Two of the three front lenses are made of extra-low dispersion (ED) glass. The lenses are air-spaced and apochromatic, for excellent control of chromatic aberration and increased sharpness and clarity. The lense configuration also provides for a flat imaging field, with no need to buy a separate field flattener accessory.

Flat Field Astrograph without Needing Backfocus Calculation
This flat field astrograph is self-flattening out of the box, with no need for backfocus calculations or additional flatteners. The 65PHQ supports a full-frame image circle of 44 mm, and comes with three adapters to attach cameras or other accessories.

Included Adapters Provide Connectivity Options
Included with the 65PHQ are three adapters to facilitate connection of cameras or accessories. These adapters are M68, M54, and M48. In addition, the M48 adapter has a 2″ female thread for attaching filters. Attached to the 2.5″ focuser is a 360° rotator that allows any attached accessories to be rotated to the user’s preferred orientation.

Recommended: Askar f/4.8, 0.75x Full-Frame Reducer (sold separately)
The Askar f/4.8, 0.75x Full-Frame Reducer features a 0.75x reduction factor, providing a faster optical system with a wider field of view, all while retaining a full-frame image circle!