ZWO Company Timeline

ZWO Founded

28 Nov 2011

China based ZWO Company was established by Founder and CEO Sam Wen.


First Camera

21 Dec 2011

Our first camera product - ASI130MM launched.

ASI120 Released

3 Sep 2012

Very famous USB2.0 camera model ASI120 was launched. Revolution in planetary imaging.

In September 2012, the now famous planetary camera, the ASI120 was born. The camera took the astrophotography world by storm thanks to the high sensitivity and low read noise of the chosen ASI120 sensor. It became the first planetary CMOS camera which could outperform a CCD sensor and rightly earned itself the Sky & Telescope Magazine’s Hot Product of 2012 award. This success was in part thanks to amateurs worldwide such as Darryl, Emil along with others, who spent many hours beta testing the ASI120 and creating the great product it became.


First USB3.0 Camera

16 Jun 2014

First USB3.0 camera model ASI120S launched. Our camera model ASI120 was anaunced for Sky&Telescope HOT product for year 2014.

In June 2014 following the success of the ASI120 camera, ZWO released the world’s first USB3.0 astro camera, the ASI120MM/MC-S. This was the first time USB3.0 technology appeared in the field of astro imaging. You can image how exciting it was to be imaging at 60 fps at 1280*960 resolution, remembering how fast we thought 10fps was in the old webcam imaging days.


ASI174 Released

6 Feb 2015

High speed 2.3 Mega Pixels camera model ASI174.

ZWO continued to develop improved planetary CMOS cameras and in February 2015 released the ASI174. This new camera made SONY’s Pregius Global shutter CMOS technology available for amateurs without breaking the bank. The ASI174 has the largest planetary and solar/lunar imaging sensor and can capture frames at an incredible 164 fps at full resolution.


Excellent Series

20 Jul 2015

Launched low read noise, high sensitivity and high speed cameras: ASI224 /185 /178 /290.

In July 2015 ZWO introduced 4 new cameras built using the latest Sony sensors, the ASI224, ASI185, ASI290 and ASI178. The extremely low read noise of these cameras make them all very suitable for planetary imaging and DSO lucky imaging. The ASI224 received The Sky & Telescope Magazine’s Hot Products for 2016 award and become the most popular planetary imaging camera in astro imaging history. It also marked a turning point for planetary imaging as this milestone marked the decline of CCD based planetary cameras.

ASI224 ASI178 ASI290

First Cooled Series

26 Nov 2015

First Cooled ASI cameras series.



21 Dec 2015

Launched Atmospheric Dispersion Corrector.


New Milestone - ASI1600

9 May 2016

New milestone! Our first deep-sky imaging optimized cooled camera ASI1600.

May 2016 marked another major milestone for ZWO and arguably the biggest to date, with the release of the ubiquitous ASI1600 series of cameras. Without a doubt the ASI1600 has changed the DSO imaging world thanks to its sensors amazingly low read noise and low dark current. The ASI1600 series cameras are the first cooled CMOS cameras suitable for DSO imaging and a game changer as sales pushed the ASI1600 into leading position overtaking the sale of CCD cameras for DSO imaging. You cannot pick up an astronomy magazine or read an astro imaging webpage without seeing stunning pictures from this camera using LRGB or narrowband filters and almost invariably with ZWO’s famous EFW filter wheel and Off Axis Guider. Truly a winning combination as seen on many selected Images of the Day.


EFW Released

12 Jul 2016

Ultra thin ASCOM Color Filter Wheel.


ASI071 Released

22 Nov 2016

ZWO’s first cooled color APS-C camera ASI071.

In November 2016 ZWO reached a new milestone with the release of its first APS-C format CMOS cooled camera, the ASI071. The ASI071 has the lowest dark current among these cooled CMOS cameras and is genuinely free of amp-glow and highly suitable for very long exposures.


Full-frame cameras Released

7 Sep 2017

ZWO’s first Full-frame cameras ASI094 and ASI128.

ASI094 ASI128

Mini Guide Camera

18 Sep 2017

Mini guide camera ASI174 and ASI290.

September 2017 saw the release of a new range of dedicated guiding cameras, the ASI120 Mini, ASI290 Mini, and ASI174 Mini. These small and flexible cameras are especially designed for guiding and capable of being mounted directly in the guide scope eye piece holder.

ASI174 ASI290

ASI294MC Released

9 Otc 2017

ASI294MC with SONY IMX294CJK sensor type 4/3.

In October 2017, ZWO released the ASI294, the first CMOS cooled camera with a 4/3″ BSI format sensor. The ASI294 was created using Sony’s latest IMX294 back-illuminated sensor which offers very high sensitivity and low read noise, and can provide a high dynamic range with its 14bit ADC. These characteristics have led to the ASI294 becoming the most popular color DSO imaging camera in the world. With the success of the ASI294 it was decided to retire the ASI1600 color model as the ASI294 beats it in all aspects.


ASI385 Released

10 Otc 2017

ASI385MC and ASI385MC-Cool Released.

ASI385MC ASI385MC-Cool

ASI183 Released

12 Dec 2017

ASI183 series Released.

December 2017 saw Christmas arrive early for some astro imagers, with the release of the 20 Megapixel ASI183 camera. The ASI183 has a peak QE of 84% and a read noise of 1.6e. The 2.4um pixel size makes it highly suitable for high resolution DSO imaging using small refractors.


ASIAIR Released

28 Jul 2018

This is a new milestone in ZWO history, astrophotography has never been easier!

And here we are in April 2018 and ZWO continues its history of creating disruptors in the astro imaging market with the release of its revolutionary ASIAIR shown for the first time at NEAF. The ASIAIR is a smart WiFi device designed for astrophotography and is completely changing the way people do imaging. It has never been easier to start in this exciting hobby.


183GT&1600GT Released

8 Oct 2019

Our ASI GT camera includes the ASI183GT and ASI1600GT monochrome CMOS cameras both offering the same outstanding performance of our ASI183 and ASI1600 monochrome cameras.

This Series contains all the great features and performance of our original cameras, including an integrated 5-position ultra-quiet electronic filter wheel, accept both 1.25” and 31mm filters.

Using the GT camera, the Deep Sky Photography becomes easier and much more freedom will be offered to astronomers.



25 Oct 2019

ASIAIR PRO is a smart WiFi device. It is equipped with a lightweight power management module, ample USB interfaces, and multiple dovetail mounting methods.

With the rich features of the ASIAIR App, the whole procedure from device integration to image capture runs particularly smooth.

ASIAIR PRO is the second generation of ZWO that has been continuously improved and newly designed since the first generation of ASIAIR was released in July 2018.


ASI533MC-P Released

19 Nov 2019

The ASI533MC-P camera uses IMX533 Square Back-illuminated CMOS sensor. It is with same Pixel Size as ASI2600MC-P/ASI6200MM-P/ASI6200MC-P camera.

This new camera has performance like Low read-out noise and high dynamic range. What’s more, it uses ZERO amp glow circuitry, you won’t have to worry about amp glow even when using high gain, long exposure imaging.

The powerful performance makes it suitable for any Deep Space Photography! Best choice for beginners of DSO shooting.


ASI2600MC-P Released

6 Dec 2019

Christmas arrives early for Astronomers, with the release of a new generation 6200 Full Frame camera. This two cameras have the IMX455 Full Frame Back-illuminated CMOS sensor, with resolution up to 9576x6388,Full Well up to 50ke, Read Noise between 1.5e-3.5e and dynamic range exceeds 14stops.

It is destined to be extraordinary as the first Full Frame camera with 16bit ADC in ZERO amp glow.


ASI6200MM-P/ASI6200MC-P Released

6 Dec 2019

Full Frame flagship camera—6200 camera

Christmas arrives early for Astronomers, with the release of a new generation 6200 Full Frame camera. This two cameras have the IMX455 Full Frame Back-illuminated CMOS sensor, with resolution up to 9576x6388,Full Well up to 50ke, Read Noise between 1.5e-3.5e and dynamic range exceeds 14stops.

It is destined to be extraordinary as the first Full Frame camera with 16bit ADC in ZERO amp glow.


ASI2400MC-P Released

1 June 2020

The ASI2400MC Pro is born to be another great innovation of ZWO in the field of full-frame cooled OSC astro cameras.

The sensor length and width are 36mm * 24mm and the diagonal is 43.3mm. For now, it only has the OSC version, which is very suitable for beginner astrophotography.


ASI462MC Released

17 June 2020

ASI462MC is the latest color planetary camera of ZWO which adopts Sony IMX462 1/2.8" format 12bit ADC sensor.

With the ability in capturing infrared lights, the super high sensitivity and ultra low readout noise, this camera is considered as the upgraded version of ASI290MC, and will offer great performance for planetary imaging, solar and lunar imaging.

The good performance of ASI462 is undoubtedly the perfect successor for ASI290, even better.


ASI294MM Pro Released

16 Sept 2020

ZWO released the Mono version ASI294MM-P camera has a very high QE value with a peak at about 90%, and feature an ultra-low readout noise of 1.2e. it comes with special unlocked Binning Mode.

If you are seeking for a small-format mono camera for astrophotography, then ASI294MM Pro gonna be your ideal choice.

This camera will be a great successor of ASI1600MM-P.


ASI2600MM Pro Released

6 Jan 2021

ASI2600MM Pro uses Sony’s latest back-illuminated IMX571 APS-C format native 16-bit ADC sensor released as new year arrives.

With the ultra-high 14 stops dynamic range, ultra-low 1.0e readout noise and an innovative breakthrough resulting in zero amp-glow, it’s destined to become a blockbuster in the year 2021.


ASIAIR Plus Released

20 Aug 2021

The 3rd edition smart WIFI controller.


ASI482MC/ASI485MC Released

6 Sep 2021

The latest OSC planetary cameras ASI482MC and ASI485MC with extremely high sensitivity and super low read out noise, considered as one powerful iteration of ZWO after years of developing process in the field of planetary cameras.



Future ...

Still under developing.