Brand: ZWO

ZWO ASI678MC/MM 12Bit CMOS Colour Camera

Brand: ZWO

ZWO ASI678MC/MM 12Bit CMOS Colour Camera

  • Sony IMX678 Sensor
  • 1/1.8" Sensor
  • 3840*2160 Resolution
  • 12 bit ADC
  • 2µm Pixel Size
  • 0.6e Read Noise
  • 11270e Full Well
  • 83% QE Peak
  • 47.5 Peak FPS
  • USB 3.0
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$365.00 CAD
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Product Description

ASI678MC/MM adopts Sony's latest generation sensor IMX678 with excellent near infrared response. With the advantages of large full well capacity, high dynamic range and low readout noise, this camera has been tested and found to have perfect performance in planetary imaging, solar and lunar imaging.

ASI678MC/MM Features

Clear in Low Light

Thanks to the back-illuminated sensor structure and advanced pixel technology, the camera has very low readout noise and has an ultra-high sensitivity. Especially in low light conditions, the camera performs very well and is able to capture very clear images of celestial objects.


ASI678MC/MM can be regarded as an upgrade of ASI178MC. It adopts the latest SONY IMX678 sensor with advanced STARVIS 2 technology. Compared to ASI178MC, this camera features zero amp glow, lower readout noise and higher sensitivity. The dark current noise is greatly decreased; the performance of near infrared is greatly improved.

USB3.0 & 256MB Memory

The camera is equipped with a USB 3.0 transmission interface and a built-in 256MB DDR3 cache to ensure stable and secure data transmission. Under long exposure, it effectively avoids frame dropping and greatly reduces the glow effect caused by slow reading speed.

No Amp Glow

ASI678MC/MM exhibits zero amp glow, no matter how long the exposure and how high the gain value. Since it is implemented directly at the hardware level, it does not require software control.

HCG Mode

The camera has a built-in HCG mode, which can effectively reduce readout noise at high gain. This allows the camera to maintain the same high dynamic range as it does at low gain. When the gain is 182, the HCG mode is automatically turned on. The readout noise is as low as 0.8e, and the dynamic range can still reach a level close to 12bit.

Quantum Efficiency

The QE curve and readout noise are very important parameters to measure the camera's performance. Higher QE and lower readout noise are nec- essary to improve the image signal-to-noise ratio.

Dark Current Noise

ASI678MC/MM has much lower dark current noises than ASI178, bringing it has better image signal-to-noise ratios. If we compare the darks frames captured with these two cameras, it can be easily found that the frame from ASI678 has much less noise and looks much smoother.

Upgraded from the ASI178MC

The ASI678MC/MM is an upgraded product of the ASI178MC. Compared to the ASI178MC, the ASI678MC/MM has lower read noise, lower dark noise, and no amp glow.

Model ASI678MC/MM ASI178MC
Color or Mono Color Color
With or Without glow Without With
Format 1/1.8" 1/1.8"
Resolution 3840*2160 3096*2080
Pixel Size 2.0μm 2.4μm
Readout Noise 0.6-2.7e (1e@8db gain) 1.4-2.2e
QE Peak 83% 80%
Full Well 11.27ke 15.0ke
ADC 12bit 14bit
Back Focus 12.5mm 12.5mm
MAX FPS 47.5fps 60fps
Diagonal 8.86mm 8.95mm

What's in the Box

  • Camera Body
  • 1.25" Cover
  • ST4 Cable
  • 1.25" Nosepiece
  • Quick Start Guide
  • USB3.0 Cable (2m)


Sensor 1/1.8" CMOS Sony-IMX678AAQR1-C
Bayer Pattern RGGB
QE peak 83%
Back focus length 12.5mm
Max fps 47.5fps
Full well 11.27Ke
Shutter Rolling shutter
Resolution 8.29Mega Pixel, 3840*2160
Pixel Size 2.0µm
Exposure Range 32μs~2000s
Interface USB 3.0 / USB 2.0 Type-B
Protect window φ21-1.1 AR
ADC 12bit
Dimension 7.68mm*4.32mm
Weight 126g
Working Temperature -5°C~50°C
Storage Temperature -10°C~60°C
Working Relative Humidity 0-80%
Supported OS WIN7/8/10 32&64, Linux, Mac



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