ZWO ASI174MM Cooled USB 3.0 Monochrome CMOS Imaging Camera - ASI174MM-COOL is no longer available.

We recommend these products instead:

ZWO ASI174MM Cooled USB 3.0 Monochrome CMOS Imaging Camera - ASI174MM-COOL Item no longer available

No Ratings Yet

Write a Review


  • Your Price:
  • $899.00
  • + FREE Shipping

Leave us your email, and we’ll let you know when this item is back in stock.

  • The ZWO ASI174MM Cooled Monochrome CMOS Imaging Camera, which has many of the same innovative features as the ASI120MM-S like a USB hub and AR window, adds two-stage TEC cooling
  • Includes a 1/1.2" Sony IMX174 CMOS image sensor with 2.35 MP effective 5.86 µm square pixels in a 1936 x 1216 imaging array
  • The IMX174 is a high performance Sony Exmor™ sensor, assuring high speed processing, low noise, and low power dissipation
  • Aforementioned regulated two-stage TEC cooling enables cooling down to 35ºC to 40ºC below ambient
Questions? Let our experts help!
  • Description

    ZWO ASI174MM Cooled Monochrome CMOS Imaging Camera

    ZWO's ASI174MM Monochrome CMOS Imaging Camera follows up on the popularity of the ASI120MM-S. However, the ASI174MM surpasses its predecessor in terms of cutting-edge functionality such as a high-speed USB hub, a standard 2” interface with M42 x 0.75 internal threads, and an AR window. However, the ZWO ASI174 camera has one important difference except, of course, for the two-stage TEC cooling function, and that is the inclusion of a Sony IMX174 monochrome CMOS sensor. This image sensor has a lot going for it when it comes to high quality solar, lunar, planetary, and deep sky imaging.

    Regulated Two Stage TEC Cooling!

    The cooled version of the ZWO ASI174MM camera allows the sensor to be cooled to 35C to 40C degrees below ambient. Below are the extra features that can be found on the camera body, specifically related to the cooling feature:

    • Just below the USB hub (dual 2.0 Out and 3.0 In), you'll find a 2.1 mm center positive input for a cooler power supply (not included). ZWO recommends 12VDC at 2A max.
    • Below the power supply input is a Cooler Power indicator LED light.
    • A huge heat sink, which is nearly 2/3 the size of the camera, is located on the side of the body.
    • The top of the camera sports a MagLev fan, which utilizes the attraction of the magnetic levitation force for low acoustic noise, high-temperature endurance, and long life.

    Sony IMX174 CMOS Sensor Features

    • 1/1.2” CMOS: The Sony IMX174 is a 13.4mm (Type 1/1.2) CMOS image sensor with 2.35 MP effective pixels in a 1936 x 1216 array. Pixel size is 5.86 µm.
    • Pregius Global Shutter: The development of a new pixel with analog memory allows for all pixels to be scanned at once. This global shutter function on the Sony IMX174 sensor means images taken of moving objects will not suffer from focal plane distortion, resulting in high picture quality. This is a really nice feature, especially when you are doing lunar or solar imaging. Bad seeing, wind, or movement can distort the image if the readout speed is not fast enough (<30fps).
    • Exmor High-Performance: Exmor is a Sony trademark, and that label means the CMOS image sensor is considered a high-performance model, with high-speed processing, low noise, and low power dissipation by using column-parallel A/D conversion.
    • High QE, Low Noise: As a general rule, we should be aiming for high QE and low noise. The peak quantum efficiency (QE) for the ZWO AI174 camera is 78%. The QE curve is slightly higher in B & G than the ASI120, and slightly lower is R and IR. Oh, the read noise? It measures out at only 6e-!
    • High Frame Rate: At full resolution, the Sony IMX174 sensor operates at 128.2 frames per second at 12 bit ADC and 164.5 frames per second at 10 bit ADC.
    • ROI Mode: Achieve an even higher frame rate with ROI (Region of Interest) mode. This mode allows you to set a maximum of 16 areas for capture inside the effective pixels area.
    • Everything you will need to control your ZWO camera is available and easily downloadable in one centralized location on the ZWO website. Click here for ZWO Software Download

    Cooler Power Supply Required. We recommend a 12V at 2.5A or more DC adapter and a battery from 9-15V to power your cooler.

    Please Note: This camera works with Windows 8.1 as long as you have the recommended driver installed (available on the ZWO website at zwoptical.com).



    Supplier SKU


    What's Included

    • ZWO ASI174MM Cooled USB 3.0 CMOS Monochrome Astronomy Camera
    • Camera Bag
    • 1.25" Nosepiece
    • 1.25" Cover
    • USB 3.0 Cable
    • Two 0.5 m USB 2.0 Cables
    • Quick Guide

  • Dimensions & Specifications

    • Sensor: 1/1.2” CMOS monochrome
    • Resolution: 2.3 MP
    • Image Array: 1936 x 1216
    • Pixel Size: 5.86 µm x 5.86 µm
    • Max Frame Rate at Full Resolution: 164 FPS
    • Max Frame Rate at 640 x 480: 397 FPS
    • Window: AR
    • USB Hub: Yes
    • Shutter: Global
    • Minimum Exposure: 32 µs
    • Maximum Exposure: 1000 seconds
    • Peak QE: 78%
    • Read Noise: 3.5e to 6e
    • Saturation Capacity: 32K
    • Dynamic Range: 72dB
    • Gain: 8 e-/ADU low speed 32 e-/ADU high speed
    • Interface: USB 3.0/USB 2.0
    • Bit Rate: 12bit output (12 bit ADC)
    • Adapter: 2” to 1.25”/M42x0.75
    • Dimensions: 78mm diameter
    • Weight: 14 oz.
    • Back Focus Distance: 17.5mm
    • Cooling: Regulated two-stage TEC
    • Delta T: 35-40 degrees C

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    2 years

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

  • Stars


    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars

    Most Helpful Reviews

    Most Critical Reviews

    All Reviews

    Displaying Reviews 1-10 of