ZWO ASI294MC Pro Manuale utente
ASI294 Manual
Revision 1.2
Mar, 2018
All material in this publication is subject to change without notice and its copyright totally
belongs to Suzhou ZWO CO.,LTD.
ASI294 Manual
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Table of Contents
ASI294 Manual...............................................................................................................................1
1. Instruction.................................................................................................................................3
2. Camera Models and Sensor Type .............................................................................................4
3. What's in the box?.....................................................................................................................5
4. Camera technical specifications................................................................................................6
5. QE Graph & Read Noise...........................................................................................................7
6. Getting to know your camera....................................................................................................9
6.1 External View......................................................................................................................9
6.2 Power consumption...........................................................................................................10
6.3 Cooling system..................................................................................................................11
6.4 Back focus distance...........................................................................................................11
6.5 Protect Window.................................................................................................................12
6.6 Analog to Digital Converter (ADC)..................................................................................12
6.7 Binning..............................................................................................................................12
6.8 DDR Buffer.......................................................................................................................12
7. How to use your camera..........................................................................................................13
8. Cleaning..................................................................................................................................16
9. Mechanical drawing................................................................................................................17
10. Servicing.................................................................................................................................18
11. Warranty .................................................................................................................................18
ASI294 Manual
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1. Instruction
Congratulations and thank you for buying one of ourASI Cameras！This manual
will give you a brief introduction to your ASI camera. Please take the time to read it
thoroughly, if you have any questions, feel free to contact us.
ASI294 Cameras are designed for astronomical photography. The excellent
performance and multifunctional usage will impress you a lot!
For software installation instructions and other technical information please refer
to “ASI USB3.0 Cameras software Manual”
https://astronomy-imaging-camera.com/
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2. Camera Models and Sensor Type
There are 2 types of ASI294 cameras:
Models
Mono or Color
Regulated TEC Cooling
Sensor
ASI294MC
Color
No
Sony IMX294
ASI294MC Pro
Color
Yes
Sony IMX294
Which camera to choose:
TEC cooling will help to reduce dark current noise for long exposures. For short exposures,
such as under one second, the dark current noise is very low, however cooling is recommended for
DSO imaging when long exposures are required.
ASI294 Manual
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3. What's in the box?
ASI294MC
ASI294MC Pro
ASI294 Manual
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4. Camera technical specifications
Sensor
SONY IMX294 CMOS
Diagonal
23.2mm
Resolution
11.7 Mega Pixels
4144*2822
Pixel Size
4.63μm
Image area
19.2mm*13mm
Max FPS at full resolution
19FPS
Shutter
Rolling shutter
Exposure Range
32μs-2000s
Read Noise
1.2e @35db gain
QE peak
TBD
Full well
63.7k e
ADC
14 bit
DDR3 buffer
256MB
Interface
USB3.0/USB2.0
Adapters
M42*0.75
Protect window
AR window
Dimensions
78mm Diameter
Weight
420g
Back Focus Distance
6.5mm
Cooling:
Regulated Two Stage TEC
Delta T
35°C -40°C below ambient
Cooling Power consumption
12V at 3A Max
Supported OS
Windows, Linux & Mac OSX
Working Temperature
-5°C ~45°C
Storage Temperature
-20°C~60°C
Working Relative Humidity
20%~80%
Storage Relative Humidity
20%~95%
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5. QE Graph & Read Noise
QE and Read noise are the most important parts to measure the performance of a camera.
Higher QE and Lower read noise are needed to improve the SNR of an image.
Relative QE Curve
Read noise includes pixel diode noise, circuit noise and ADC quantization error noise, and
the lower the better.
The Read Noise of the ASI294 cameras is special. HCG (high conversion gain) mode, which
reduces read noise to even lower levels at higher gain without loss to dynamic range, is
automatically enabled when the gain setting is 120 or higher. Read noise will drop to under 2e-,
while dynamic range will remain at 13 stops.
Depending on your target, you can set the gain lower for higher dynamic range (longer
exposure) or set the gain higher for lower noise ( such as short exposure or lucky imaging).
ASI294 Manual
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ASI294 Manual
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6. Getting to know your camera
6.1 External View
*The first generation of cooled camera we used a ST4 port instead of USB2.0 hub
T2 extender ring:
2”diameter
T2 screws inside
11mm length
Can be removed
Protect and sealed window
AR coated D32*2mm
Heat Sink
USB2.0 Hub
USB3.0 or USB2.0 IN
Cooler power supply
5.5*2.1 DC socket
12V 3A AC-DC power
supply suggested
Cooler Maglev fan
Only on when cooler
power supply is there
Protective and
sealed window
AR coated
D32*2mm
USB3.0 or USB2.0 IN
ST4 Guide Port
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You can order the holder ring from us or our dealer to mount the cooled camera to tripod.
There is 1/4″ screw under the holder
6.2 Power consumption
ASI cameras are designed to have very low power consumption which is around 300ma@5V.
You only need the USB cable to power up the camera, however you will need a separate power
supply to activate the cooler. Recommended cooler power supply: 12V @ 3-5A (or more) DC
adapter (2.1x5.5mm, center pole positive). Also suitable: DC battery with 9-15V. Using a battery
with 9-15V is also suitable for the cooler power supply.
Here is a test result of the cooler power consumption of our cooled camera. It only needs
0.5A to cool the camera to 30℃below ambient.
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