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ZWO ASI174MM USB3.0 Monochrome CMOS Camera with Globar Shutter Technology and Autoguider Port

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in In stock (4)
0.90 kg
Camera Type Planetary Imager
Deep Sky imager
CMOS Camera
Our price:
including VAT 20.00 % ( £99.83 )

ZWO ASI174MM USB3.0 Monochrome CMOS Camera with Globar Shutter Technology and Autoguider Port


This NEW camera makes SONY's Pregius Global Shutter CMOS technology available for amateurs without braking the bank. It comes with a large sensor, large pixel size, high frame rate and comparatively high resolution that makes it the best choice for a beginner who want to focus on Lunar and Solar imaging and try his skills in deep sky imaging as well.
(Don't forget that you'll need a proper solar filter in front of your telescope for solar imaging if it's a SCT, Mak or Newtonian and other proper solar technology for refractor telescopes....if you are not sure, ask us for the sake of your safety.)

This camera comes with USB3.0 connection that gives you the opportunity to use it with newer laptops and is backward compatible with USB2.0. There is no USB 2.0 version of this camera as that simply won't be enough to use the camera's possible high framerate. High framerates are not a guarantee for excellent images, but certainly helpful if other circumstances are given.

It comes with an AUTOGUIDER PORT just as many other ZWO cameras, so you may use it for both imaging or guiding!

This camera will mostly be used for imaging the Sun and the Moon, but it can also be used for deep sky imaging up to a certain level as it supports up to 1000seconds exposure time. This monochrome version is recommended for L-RGB or narrow band deep sky photography if you want to get out the best data from your camera and achieve sharp, contrasty deep sky, solar or lunar images, but if you don't want the hassle or cannot spend much time and happy to go for a compromise, simply choose the colour version, the ZWO ASI174MC.

With this monochrome version, you'll also need a filter wheel and a set of L-RGB filters or H-alpha and OIII filters, and maybe even H-beta and SII filters as well for narrow band astro photography...)

Features of the ZWO ASI174MM Camera
Recommended for the Sun, Moon and some deep sky objects
(To image the Sun you'll have to use a proper front solar filter or Herschel wedge depending on your telescope type. Please contact us if not sure!)
Resolution: 1936X1216 at up to 164fps (at 12bit ADC) or 128fps (at 10 bit ADC)
Long time exposure up to 1000s!
Autoguider Port
Built-in RAW mode and Grey mode output support. Only about 30% storage space required compared to the Color data format!
Peak Quantum Efficiency: 78% (this is a very high value)
No fixed pattern noise (FPN)!
Full aluminum housing with standard 2" interface
M42X0.75 internal thread.
(T-thread to C-mount adapter is not included due to the size of the sensor. It could be purchased separately, but might cause vignetting.)
Compatible with DirectShow and ASCOM
Compatible with MaxIm-DLSupported OS: Windows, Linux, Arm-linux, Mac OSX


On the included CD you'll find drivers and two software applications: Firecapture and SharpCap. These are both freeware and the latest versions can be downloaded from the developers' websites.
If you have any problem with installing any of the software from the CD, please download them from here:
Firecapture Beta Downloads
SharpCap Downloads

We'd recommend to use the latest version of Firecapture with the USB3.0 ZWO ASI cameras...

Specification of ZWO ASI174MM USB3.0

Sensor: 1/1.2" CMOS SONY IMX174LLJ
Resolution: 2.3Mega Pixels 1936x1216
Pixel Size: 5.86µm
Exposure Rage: 32µs-1000s

Supported Resolutions:
12bit ADC:
2X2Bin : 968x608@128FPS

10bit ADC:
2X2Bin : 968x608@164FPS

ROI: Supported
Interface: USB3.0  (and backward compatible with USB2.0 as well)
Bit rate: 12bit output(12bit ADC)
Adaptor: 2" / 1.25" / M42X0.75
Dimension: φ62mm X 41mm
Weight: 140g

Working Temperature: -5°C—45°C
Storage Temperature: -20°C—60°C
Working Relative Humidity: 20%—80%
Storage Relative Humidity: 20%—95%

Transmission chart of the Clear filter used as an optical window in the ZWO ASI174 CMOS cameras

For full specification, driver installation tutorial (youtube video), basic usage information and recommended third party software please visit the manufacturer's website: ZWOptical

There is a Yahoo Group where you can find lots of information about how other members use the ZWO cameras: Yahoo Group ZWO ASI Cameras

Below is an example of a planetary imaging setup with a Imaging Flip Mirror, ZWO Filter Wheel and ZWO ASI120MM monochrome camera. With the help of a Variable Locking T2 Extension we could achieve parfocality.  The eyepiece holder (that is part of the Imaging Flip Mirror) is also adjustable, so with these two adjastable items we can achieve various positions of the eyepiece thus parfocality can be achieved with eyepieces of various focal lengths. To see approximately the same field, you'd have to use an eyepiece with approximately 6mm focal length. Please note that this setup might not work for a Newtonian telescope due to the long back focus requirement.

Click on the above image to see it in full resolution.

Customer images

Matthew Foyle from Lady Manners School provided kindly his very first images of the Sun that he took together with pupils using the ZWO ASI174MM camera, a Lunt LS60THa Solar telescope and a Skywatcher EQ5 Pro mount. This is part of their Royal Society project.

Above: they recorded a video segment, then thousands of images were stacked together to create one final monochrome image.

Above: invert image of the previous image


The camera is monochrome (!!!), so the above colour image has been coloured in PhotoShop to show what they were approximately seeing through the Lunt solar telescope.

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