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Quadruplet Apo Refractors

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PREORDER กล้องดูดาว Askar 65PHQ 65mm f/6.4 Quadruplet Flat-Field Astrograph

กล้องดูดาว Askar 65PHQ 65mm f/6.4 Quadruplet Flat-Field Astrograph #65PHQ

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.

		(0 รีวิว)

฿26,990.00

~~฿29,990.00~~ ส่วนลด 10%

SALE

*PREORDER* ZWO FF65 APO Astronomical Telescope

ZWO FF65 APO Astronomical Telescope

(0 รีวิว)

฿31,990.00

Askar FRA300 Pro 60mm f/5 Quintuplet Petzval Flat-Field Astrograph #FRA300

กล้องดูดาว Askar FRA300 Pro 60mm f/5 Quintuplet Petzval Flat-Field Astrograph #FRA300

Askar FRA300 Quintuplet refractor with 60mm aperture and f/5 focal ratio, ideal for wide-field imaging of the deep sky
Quintuplet Petzval ED design delivers flat field across 44mm image circle with virtually no chromatic aberration
Includes rotatable 2.5” dual-speed rack-and-pinion focuser, Vixen-style dovetail, tube rings, and carrying handle
Length = 303mm, Weight = 3.12kg

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฿31,990.00

$*ลดล้างสต๊อก* William Optics RedCat 71 71mm f/4.9 Petzval Apo Refractor Telescope$

ลดล้างสต๊อก William Optics RedCat 71 71mm f/4.9 Petzval Apo Refractor Telescope

William Optics RedCat 71 348mm f/4.9 Petzval Apo astrograph

The WO Cat71 is a 71-mm f/4.9 refractor using a Petzval design with a doublet front element incorporating FPL-53 glass, plus a single central element and a single rear lens. By this design, our WO Cat71 provides a flat image plane without any additional flattener and the image circle is over 45mm. WO Cat71 is designed primarily for imaging, making it an astrograph.

		(0 รีวิว)

฿39,990.00

~~฿63,990.00~~ ส่วนลด 38%

SALE

กล้องดูดาว Askar FRA400 72mm f/5.6 Quintuplet Petzval Flat-Field Astrograph #FRA400

ASKAR FRA400 Quintuplet refractor with 72mm aperture and f/5.6 focal ratio, ideal for wide-field imaging of the deep sky
Petzval design ensures flat field across 44mm image circle, while two ED elements virtually eliminate chromatic aberration
Rotatable 3” rack-and-pinion focuser, M68-M48 adapter, 2” adapter ring, and 1.25”-2” adapter
Includes mounting rings, Vixen-style dovetail, and carrying handle

		(0 รีวิว)

฿39,990.00

กล้องดูดาว Askar 80PHQ 80mm f/7.5 Quadruplet Flat-Field Astrograph

กล้องดูดาว Askar 80PHQ 80mm f/7.5 Quadruplet Flat-Field Astrograph #80PHQ

80PHQ inherits the optical design of the PHQ family, adopting a 3+1 quadruplet lens structure which contains two pieces of ED glass that can effectively reduce chromatic aberration and enhance clarity and sharpness. It’s worth mentioning that all astrographs from the PHQ family come with an integrated lens combination rather than simply placing three major lenses and a corrector together in a line. In other words, the whole optical system cannot solely perform without any piece of these lenses. This structure design leads to a more rational lens arrangement, better vignette control and superior image quality. The focal ratio of 80PHQ is f/7.5. It’s a “long” focal-ratio astrograph compared with other counterparts from Askar. It’s a little bit longer even compared with 107PHQ which is f/7 in focal ratio.

		(0 รีวิว)

฿43,990.00

~~฿49,990.00~~ ส่วนลด 12%

SALE

*PREORDER* ZWO FF80 APO Astronomical Telescope

ZWO FF80 APO Astronomical Telescope

(0 รีวิว)

฿51,990.00

กล้องดูดาว Askar FRA500 90mm f/5.6 Quintuplet Petzval Flat-Field Astrograph #FRA500

ASKAR FRA500 Quintuplet refractor with 90mm aperture and f/5.6 focal ratio, ideal for wide-field deep sky imaging
Petzval design ensures flat field across big 55mm image circle, while two ED elements virtually eliminate chromatic aberration
Rotatable 3.5” rack-and-pinion focuser and four element threaded conical adapter
Includes mounting rings, Losmandy-style dovetail, carrying handle, and hard case

		(0 รีวิว)

฿67,990.00

SALE

PREORDER กล้องดูดาว Askar 107PHQ 107mm f/7 Quadruplet Flat-Field Astrograph

กล้องดูดาว Askar 107PHQ 107mm f/7 Quadruplet Flat-Field Astrograph #107PHQ

Askar 107PHQ four-element refractor with 107mm aperture and f/7 focal ratio, ideal for lunar, planetary, and deep sky imaging and visual observing
Built-in field flattener ensures excellent optical performance across big 44mm image circle
Air-spaced triplet objective with two ED elements virtually eliminate chromatic aberration
Rotatable 3.4” rack-and-pinion focuser, threaded adapters, 2” adapter ring, and 1.25”-2” adapter
Includes mounting rings, Vixen-style dovetail, carrying handle, and hard case

		(0 รีวิว)

฿69,990.00

~~฿75,990.00~~ ส่วนลด 8%

SALE

*PREORDER* ZWO FF107 APO Astronomical Telescope

ZWO FF107 APO Astronomical Telescope

(0 รีวิว)

฿79,990.00

กล้องดูดาว Askar 130PHQ 130mm f/7.7 Quadruplet Flat-Field Astrograph

กล้องดูดาว Askar 130PHQ 130mm f/7.7 Quadruplet Flat-Field Astrograph #130PHQ

Askar 130PHQ four-element refractor with 130mm aperture and f/7.7 focal ratio, ideal for lunar, planetary, and deep sky imaging and visual observing
Built-in field flattener ensures excellent optical performance across big 60mm image circle
Air-spaced triplet objective with two ED elements virtually eliminate chromatic aberration
Rotatable 3.4” rack-and-pinion focuser, threaded adapters, 2” adapter ring
Includes mounting rings, Losmandy-style dovetail, carrying handle, and hard case