ZWO ASI432 User manual
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ASI432 Manual
Revision 1.0
Aug, 2022
All materials related to this publication are subject to change without notice and its copyright
totally belongs to Suzhou ZWO CO.,LTD.
Please download the latest version from our Official website.
ASI432 Manual
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Table of Contents
ASI432 Manual.................................................................................................................................1
1. Instruction.................................................................................................................................3
2. What’s in the box? ....................................................................................................................4
3. Camera technical specifications................................................................................................5
4. QE graph & Read noise ............................................................................................................6
5. Amp glow .................................................................................................................................8
6. Getting to know your camera....................................................................................................8
6.1 External View......................................................................................................................8
6.2 Structural dimension diagram.............................................................................................9
6.3 Power consumption.............................................................................................................9
6.4 Protect window ...................................................................................................................9
6.5 Analog to Digital Converter (ADC)..................................................................................10
6.6 Binning..............................................................................................................................10
7. How to use your camera...........................................................................................................11
Notice for use..........................................................................................................................12
8. Cleaning...................................................................................................................................13
9. Warranty ..................................................................................................................................14
10. Servicing...................................................................................................................................15
ASI432 Manual
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1. Instruction
Congratulations and thank you for buying one of our ASI Cameras! This manual will give you a
brief introduction to your ASI camera. Please take the time to read it thoroughly and if you have
any other questions, please feel free to submit it on the ZWO support site:
https://support.astronomy-imaging-camera.com/
The ASI432MM is one of the latest color planetary cameras released by ZWO in 2022. Packed
with Sony sensor IMX432, this camera has some very great highlights, including a large sensor
format of 1.1”, a large pixel size of 9.0um, and super-fast frame rate up to 120fps.
Model
Mono/Color
Sensor
ASI432MM
Color
SONY IMX432
For software installation instructions and other technical information, please refer to our official
website https://astronomy-imaging-camera.com/
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2. What’s in the box?
ASI432MM
ASI432 Manual
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3. Camera technical specifications
Sensor
SONY IMX432LLJ-C
Format
1.1”
Diagonal
17.6mm
Resolution
1.77 Mega Pixel, 1608*1104
Pixel size
9µm
Sensor size
14.472mm * 9.936mm
Max fps
120
Shutter
Global shutter
Exposure range
32µs-2000s
Readout noise
2.4 ~ 20.8e (4.3e@14db gain)
QE peak
79%
Full well
97ke
ADC
12bit
USB interface
USB 3.0
Adapters
2”/M42X0.75
Protect window
AR D25*1mm
Dimension
62mm
Weight
126g
Back focus length
6.5mm/17.5mm
Supported OS
Windows, Linux & Mac OSX
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4. 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.
The following figure shows the QE curve of ASI432. According to our measurement, the QE peak
of ASI432 is 79%.
Compared to traditional CCD cameras, the readout noise of ASI432 is extremely low. The built-in
HCG mode can effectively reduce readout noise at high gain and allow the camera to maintain the
same high dynamic range as it does at low gain. When the gain is 140, the HCG mode is
automatically turned on and the dynamic range rises back to 12bit. When the gain is 400, the
readout noise is 2.4e.
ASI432 Manual
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ASI432 Manual
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5. Amp glow
The IMX432 sensor has amp glow with itself but ZWO’s anti-amp glow function has greatly
reduced it and maximized the camera’s photographic performance.
Please notice that ASI432MM still has amp glow. However, they can be easily calibrated with
dark frames.
6. Getting to know your camera
6.1 External View
①USB 3.0 & USB 2.0 Input
②ST4 Guide port
③AR Protective window D21*1mm
④1/4” screw: allowing you mount the camera to tripod.
ASI432 Manual
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6.2 Structural dimension diagram
6.3 Power consumption
ASI432 camera is built with low power consumption, max at 2.96W with USB power supply.
6.4 Protect window
There is a protective window AR filter in front of the ASI432 camera sensor, with 21mm diameter
and 1mm thickness.
ASI432 Manual
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6.5 Analog to Digital Converter (ADC)
The ASI432 camera records in 12bit ADC and 10bit ADC. You can image at a faster fps rate if you
use 10bitADC (high speed mode). You can also set an ROI if you want even faster fps rate.
Below are the maximum speeds of ASI432 running at differentADC modes.
Resolution
USB3.0
USB2.0
12BIT ADC
12BIT ADC
RAW16
RAW8
RAW16
RAW8
1608*1104
108.7
120
12.2
24.3
1280*720
178
178
23.5
47
640*480
256
256
70.5
141.3
320*240
454.7
454.7
283.2
454.7
6.6 Binning
ASI432 camera supports software bin2, bin3 and bin4 mode and hardware bin2, bin3 and bin4
mode.
The biggest benefit is a faster frame rate. If you don't care about speed, we suggest you use
software binning.
ASI432 Manual
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Notice for use
Below are the requirements for camera storage and working temperature. Please don’t use your
camera when the environment does not meet these requirements, otherwise the camera might get
damaged.
Working temperature
-5°C ~50°C
Working humidity
20% ~ 80%
Storage temperature
-20°C ~ 60°C
Storage humidity
20% ~ 95%
Do not use corrosive solutions to clean the camera, so as not to corrode the surface oxide layer and
not to damage the camera; Meanwhile, do not expose the camera to the sun for a long time, so as
not to discolor the appearance of the oxide layer.
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8. Cleaning
The camera is sealed and comes with an AR protect window to protect the sensor from dusts and
humidity.
To see the dusts, you just need to set up your telescope and point it to a bright place. A Barlow is
required to see these dusts clearly. Then attach the camera and adjust the exposure to make sure
not overly exposed. You can see an image like below if it’s dirty.
The big dim spot on the image (right side) are the shadows of dust on the protect window.
The very small but very dark spot on the image (at left) are the shadows of the dusts on the sensor.
If above situation occurs, it is recommended that the dust on the sensor surface be blew off with
air pump. If it cannot be blown off, it is recommended to use cotton swabs and 99% anhydrous
ethanol to gently wipe the sensor.
We have very detailed instruction on our website:
https://astronomy-imaging-camera.com/manuals/How_to_clean_ASI_camera_and_redry_the_desi
ccant.pdf
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9. Warranty
1. ZWO will provide a 2-year free warranty service (Warranty Period) for ZWO products
purchased by Users from ZWO (“Products”) in accordance with this Policy, commencing on the
day following receipt of the Products by Users. For ASIAIR Plus users, commencing on the day of
device activation.
2. If a User encounters the following Dead on Arrival (DOA) and contacts ZWO within the
corresponding time limit to issue the Product purchase invoice and relevant evidence, ZWO will
provide door-to-door pick-up service and, as appropriate, after-sale replacement (or partial
replacement), repair or return (or partial return) service for the following Products:
1) Product quality problem
Provided that a User detects a quality problem and contacts ZWO within 30 days after receipt of
the Products, and ZWO support team confirms that the Products indeed have a quality problem or
defect after their inspection, ZWO will provide free replacement service towards such Products;
2) Product transportation problem
Provided that a User finds obvious signs of bubbling, serious overstocking, or deformation on the
outer package of the Products upon receipt of the Products, and provides ZWO with pictures of
the outer package and proof of receipt within 3 days after receipt of such Products, ZWO support
team will verify the actual shipper and determine the responsible party for such transportation
problem. In the event that ZWO is the actual shipper, ZWO will be responsible for providing the
relevant return or replacement service, however, if the Products are directly sold or transported to
the User by an agent of ZWO, the agent will be responsible for providing the relevant return or
replacement service.
3. If the Products are under the following circumstances, they are not within the scope of warranty
service, ZWO may provide maintenance services to the Users:
1) The Warranty Period of the Products has expired; or
2) The Products are injected into liquid or affected by moisture or corrosion; or
3) The Products are damaged by an external force (such as the broken of the camera protection
window glass, the deformation of the product shell, the broken of the USB port, etc.); or
4) Disassembling, repairing by a third party, refurbishment of the Products (such as downloading
erroneous firmware) without the written authorization of ZWO; or
5) The product system is modified, or the maintenance notice is lost or changed; or
6) Product quality problem caused by installation not following the requirements or instructions
for the Products; or
7) Physical damage or failure of the Products caused by the force majeure (such as strong
vibration or extrusion such as flood, fire, earthquake, or thunder stroke); or
8)Damage caused by the improper User operation during the period of shooting or use, such as
using without the equipment protection or direct shooting of the sun; or
9) No valid purchase invoice or warranty certificate; or
10) The Products are second-hand products.
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Any quality problem with the accessories or other parts of the Products is not a condition for the
return or change of the Products, and the User may solely request to replace the accessories with
new ones, which shall be handled after verification by ZWO support team.
If the issue with your ZWO product was caused by certain damage (such as severe damage not
covered by the 2-year warranty), you might have to pay the replacement value.
10. Servicing
For software upgrades, please refer to “Support-manual and software” on our official website.
https://astronomy-imaging-camera.com/
For repairs and consultation, you can visit here: https://support.astronomy-imaging-camera.com/
Note:
1. For the normal repair or replacement of the Products during the Warranty Period, the User will
bear the return cost. When returning the Products, Users shall specify the actual reasons for the
damage to the Products, and shall provide the corresponding valid certificates, such as pictures or
videos, etc.
For the Products that need to be replaced after being confirmed by ZWO in writing, the User shall
return the Products with the complete package, together with all accessories, manuals, etc., to the
address designated by ZWO.
By sending back the product to ZWO, the User agrees to pay out-of-warranty fees that may arise
during the repair process of the product. ZWO will send back the product after charging.
2. For the Products that need to be returned for after-sales service, ZWO will provide the
corresponding RMA code for reference.
ZWO will not accept any products having no RMA code that have been returned privately without
ZWO written confirmation.
3. If a User purchases the ZWO Products from a ZWO agent, the User may contact the ZWO
agent directly for the relevant after-sales service.
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