Askar PHQ65 APO Refractor (65 mm Quintuplet f/6.4) – Dark Clear Skies
Askar
ASKAR-65PHQ-GREEN
£859.00
Liquid error (snippets/product-blocks line 104): divided by 0Off
Unit price
/
Askar PHQ65 – Quintuplet Flat-Field APO Refractor
The Askar PHQ65 is a premium quintuplet APO refractor
engineered for astrophotography. Its flat-field optical design means no
separate flattener is required—making setup simple while delivering
pinpoint stars across APS-C and full-frame sensors.
Key features
-
Aperture: 65 mm with a high-quality APO quintuplet design.
-
Flat field: Built-in correction—no extra flattener needed.
-
Focal length: 416 mm at f/6.4, perfect for nebulae and clusters.
-
ED elements: Suppresses chromatic aberration for sharp, colour-pure images.
-
Portable: Compact OTA with retractable dew shield for travel rigs.
-
Imaging ready: Sturdy rack-and-pinion focuser with dual-speed control.
Technical summary
Optical design |
Quintuplet APO with flat field |
Aperture |
65 mm |
Focal length |
416 mm |
Focal ratio |
f/6.4 |
Image circle |
Full-frame compatible |
Focuser |
2.5″ rack-and-pinion, dual-speed |
Weight (OTA) |
~3.9 kg |
Included |
OTA, tube rings, dovetail, adapters |
Best for
- Wide-field astrophotography with APS-C and full-frame sensors
- Travelling astrophotographers who want a compact yet powerful APO
- Large nebulae, clusters, and Milky Way fields
Product introduction
长友气体
长友气体
65mm aperture
长友气体
416mm focal length
长友气体
Quadruplet air-spaced APO design
长友气体
Supporting full frame
长友气体
Central RMS radius 2.5um
长友气体
No need for flattener
长友气体
0.75x Reducer
(optional)
长友气体
No need to calculate the backfocus
长友气体
Retractable lens hood
长友气体
300mm dovetail plate
长友气体
multi-functional handle
长友气体
2.5" large rack- pinion focuser
长友气体
1:10 fine adjustment
长友气体
Various adapter
65PHQ is a flatfield astrograph newly launched after 80PHQ, 107PHQ, and 130PHQ. 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 it with any possible imaging accessories, make the target stay at the focus, and then the whole optical system is perfect for imaging.
65PHQ has a smaller size than other PHQ astrographs. 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 the astronomical shooting. It supports the full-frame image circle and has a fine spot diagram with tiny distortions of the peripheral stars.
长友气体
65PHQ comes with a telescopic lens hood, a high-quality CNC machined and painted tube, and attractive decorative parts. The OTA weighs 2kg, and the full package with tube rings, etc. weighs 2.8kg. The 2.5” rigid focuser comes with a new-type 360° rotator with scales and a finder base. M68, M54, and M48 camera adapters are also attached, and the M48 adapter has a 2” female thread for installing filters.
It is also a nice choice for your visual observation. It fits diagonals as well as various eyepieces and can achieve a perfect focus. It can even be used to observe planets with a super-high magnification eyepiece. The 65PHQ contains a multifunctional handle, a 300mm dovetail plate, and sturdy double tube rings. It is small in size and light in weight, which perfectly caters to your need for viewing and shooting.
长友气体
Specifications
65PHQ Parameters
Aperture size
65mm
Focal length
416mm
Focal ratio
f/6.4
Objective lens
Quintuplet air-spaced APO (including two ED glasses)
Image circle
44mm
Maximum accessory connection (with the focuser fully retreated):
Imaging mode
76mm(from the base of M48×0.75 male thread)
105mm(from the base of M54×0.75 male thread)
130mm(from the base of M68×1 male thread)
Observing mode
121mm(from the end of 2" eyepiece holder)
Total length
328mm(including 1.25" eyepiece holder as dew shield contracted)
388mm(including 1.25" eyepiece holder as dew shield fully stretched)
360mm(including the 3-piece adapter as dew shield contracted)
420mm(including the 3-piece adapter as dew shield fully stretched)
OTA Weight
2kg
Total Weight (Including tube ring&dovetail plate)
2.8kg
Rear-end thread type
M68×1-M54×0.75
M54×0.75-M54×0.75
M54×0.75-M48×0.75 (M48×0.75 filter thread inside)
Rear end of the 3-piece photographic adapters
M48×0.75
Standard package items
A 65PHQ OTA, a pair of tube rings, a handle, Askar 300mm Vixen-style dovetail plate, a set of 3-piece photographic adapters, a manual
长友气体
Video
Images
长友气体
Logan Carpenter | OED1 - The NilAdh Bubble | ASKAR 65PHQ+ZWO ASI2600MM Pro
长友气体
酱油颜 | NGC6992 | ASKAR 65PHQ+294mc | Colour Magic Super Duo Narrowband Filter
长友气体
酱油颜 | NGC7293 | ASKAR 65PHQ+294mc | Colour Magic Super Duo Narrowband Filter
长友气体
Zhu Li Qun | Heart Nebula+Soul Nebula | ASKAR 65PHQ+6200mm | SHO total 8 hours
长友气体
James Negri | M42, The Great Orion Nebula | ASKAR 65PHQ+ASI533mc | Astronomik L-2 Luminance UV/IR Block 1.25"
长友气体
Rumen Bogdanovski | Lagoon and Trifid nebulae | ASKAR 65PHQ+Player One Poseidon C Camera | Colour Magic D1
长友气体
Rumen Bogdanovski | NGC 2237 | ASKAR 65PHQ+playerone poseidon c pro | Colour Magic D1
长友气体
Rumen Bogdanovski | M8+M20 | ASKAR 65PHQ | Colour Magic D1