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ZWO ASI294MC Colour 4/3" CMOS USB3.0 Deep Sky Imager Camera

ZWO ASI294MC Colour 4/3'' CMOS USB3.0 Deep Sky Imager Camera
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Price:  £774.00(Inc. 20% VAT)
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Product Code:  ZWO-ASI294MC
Manufacturer:  ZWO


Similarly to the ZWO ASI1600MC camera, the ASi294MC camera would be an excellent choice for imaging deep sky objects, however it can do much more than that. With a max framerate of 19 FPS at 10 bit ADC and 16 FPS at 14 bit ADC this camera can also be used as an extremely high resolution planetary imager. If you cannot decide if your thing is deep sky or planetary imaging, go for this camera. It is also a much more affordable alternative to converting a dSLR.

You can even use it for guiding, although we understand that it is somewhat a waste of a talent to use it for guiding, but there might be special circumstances or setups when you would want to use it for guiding, so the opportunity is given.

There are two versions with this same large 4/3" sensor (23.2mm diagonal):

Colour cooled or uncooled. (There is no monochrome version of this sensor.)

If you would mainly use it as a deep sky imager camera, we'd also recommend to go for the COOLED version, but if you cannot afford or you'd be mainly using it as a very high resolution planetary imager, then go for the UNCOOLED version.

This product listing is for the UNCOOLED version of the ASI294MC.

With the ZWO ASI294MC you won't have to spend lots of time to get beautiful images, however, if you want to get the best results from this range of cameras and you have plenty of time to spare, why not to try L-RGB or narrow band photography with the monochrome version of the similar ZWO ASI1600MM or ZWO ASI1600MM-COOL. (If you go for the monochrome version, you'll also need a filter wheel and a set of L-RGB filters, plus H-alpha, OIII and SII filters, and maybe even H-beta filter as well for narrow band photography...)

Please note that the sensor diagonal size is very close to the internal clear aperture of a 1.25" filter, therefore with extremely fast telescopes (small f-ratio) there might be vignetting. The limiting f-ratio will depend on the telescope and whether you will use any filters with this camera. Although it's a colour camera, good results can be achieved by using filters against light pollution and even H-alpha or other narrowband filters in certain setups.

Features of the NEW ZWO ASI294MC

Recommended for Deep Sky Imaging as well as the Sun, Moon and planets at very high resolution (although monochrome ASI174 would be better for the Sun)
(To image the Sun you'll have to use a proper front solar filter or Herschel wedge depending on your telescope. Please contact us if not sure!)

High-Sensitivity Type 4/3 CMOS Image Sensor that Supports 4K for Astronomic Cameras and Industrial Applications

The “IMX294CJK” is the first in-house image sensor for astronomic cameras to adopt the Type 4/3 format, and realizes output of the number of pixels needed for 4K at 120 frame/s (in ADC 10-bit output mode, ASI294MC can run up to 25fps at 4k format base on USB3.0 bandwidth). In addition, use of a large-size pixel achieves SNR1s of 0.14 lx* which is very close to the value of ASI224(0.13 lx*).

Exceptional low-illumination performance

Exceptional low-illumination performance of SNR1s: 0.14 lx is realized by use of a large-size optical system and by expanding the area per pixel to 4.63 µm. This makes the IMX294CJK ideal sensor for astronomic camera market applications which requires low-illumination performance.

14bit ADC & 13 stops DR

ASI294 have 14bit ADC and it can achieve 13 stops dynamic range which is even better than ASI1600.

HCG Mode

HCG mode will be on when gain is higher than 120(12db), read noise will drop below 2e but same dynamic range(13 stops).

Resolution: 11.7MPixel 4144 x 2822
Pixel Size: 4.63µm
Exposure range: 32µs - 2000s!
Read Noise: 1.2e  - 7.3e
Full Well: 63700e
ADC: 14 bit
Cooling: 40 - 45 degrees below ambient (obviously, only on the cooled version)
Standard Autoguider Port
Peak Quantum Efficiency: TBC
Full aluminum housing with standard 2" interface
M42X0.75 internal thread (T-thread)
Back Focus: 6.5mm (from camera front)
Back Focus: 17.5mm (from front of 11mm reverse thread adapter)

Camera technical details

Sensor: 4/3″ SONY IMX294 CMOS
Diagonal: 23.2mm
Resolution: 11.3Mega Pixels 4144 x 2822
Pixel Size: 4.63µm
Bayer Pattern: RGGB
Exposure Range: 32µs-2000s
ROI: Supported
ST4 Guider Port: Yes
Focus Distance to Sensor: 12.5mm
Shutter Type: Rolling Shutter
Protect window: AR coated window
Operating System Compatibility: Mac, Windows, Linux
Interface: USB3.0/USB2.0
Bit rate: 12bit output(12bit ADC)
Adaptor: 2″ / 1.25″ / M42X0.75
Dimension: φ62mm X 36mm
Weight: 120g or 4.2 ounces (without lens)
Working Temperature: -5°C—45°C
Storage Temperature: -20°C—60°C
Working Relative Humidity: 20%—80%
Storage Relative Humidity: 20%—95%
Max FPS at full resolution:
10Bit ADC
4144×2822 19fps
14bit ADC
4144×2822 16fps
More resolutions can be user defined

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