The new Askar 65PHQ 0.75× Full-Frame Reducer has a quadruplet design and the 0.75× reduction gives the Askar 65PHQ a shortened focal ratio of f/4.8 and a shortened focal length of 312mm. This reducer, connected with the astrograph, can effectively shorten the exposure time and dramatically increase your field of view, bringing more convenience and possibilities for your deep-sky astrophotography. The backfocus is the standard 55mm and it comes with two thread adapters of M54, M48 with a built-in M48×0.75 2” filter thread, so it is convenient for connection.
The Askar 65PHQ was recently introduced and is a flatfield astrograph which joins the Askar lineup of the 80PHQ, 107PHQ, and 130PHQ. Available in the company’s traditional green and white color combo, the company is also offering a limited quantity 2023 pink version.
As the company notes about the PHQ telescopes, “Instead of buying extra flatteners, calculating the back focus of the flattener, or making a tedious connection to match the correct distance, astrophotographers can simply equip the telescope with any possible imaging accessories, make the target stay at the focus, and then the whole optical system is perfect for imaging.”
The Askar 65PHQ has been designed to perform in a smaller format than the other PHQ astrographs. The 65PHQ has a focal ratio of f/6.4 and a focal length of 416mm. Instead of the quadruplet structure of other PHQs, the 65PHQ is a quintuplet with two ED glasses which offers excellent control of chromatic and other aberrations. With its self-flattening design, 65PHQ offers strong advantages in astronomical imaging as it supports a full-frame image circle and has a fine spot diagram with tiny distortions of the peripheral stars. And as with Askar’s other PHQ telescopes, there is no need to calculate the back focus or buy a separate flattener.
The OTA weighs just 2kg and the full package with tube rings, etc. weighs in at 2.8kg. The 2.5” rigid focuser comes with a newly designed 360° rotator with scales and a finder base. M68, M54, and M48 camera adapters are also included and the M48 adapter has a 2” female thread for installing filters. The 65PHQ also includes contains a multifunctional handle, 300mm dovetail plate and sturdy double tube rings.
The Askar 65PHQ is also a nice choice for visual observation. With different diagonals and various eyepieces it can achieve perfect focus. It can even be used to observe planets with a super-high magnification eyepiece.
The Askar 65PHQ specifications include:
– Optical Design: Refractor
– Focal Ratio: f/6.4
– Aperture: 64mm (2.5″)
– Number of Elements: 5 (Quintuplet)
– Focal Length: 416mm
– Image Circle: 44 mm
– Focuser: 2.5″ Dual Speed Rack & Pinion
– OTA Extended: 16.5”
– OTA Retracted: 12.9”
– OTA Weight: 6.2lb
The 65PHQ contains a multifunctional handle, 300mm dovetail plate and sturdy double tube rings.
You can learn more about the Askar 65PHQ and the Askar 65PHQ 0.75× Full-Frame Reducer here.
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