ZWO ASI385 Color CMOS Astronomy Camera User Manual

ASI385 Manual
Revision 1.2 Aug 2021
All materials related to this publication are subject to change without notice and its copyright totally belongs to Suzhou ZWO CO., LTD.

Instruction

Congratulations and thank you for buying one of our ASI CamerasThis manuals will give you a brief introduction to your ASI camera. Please read it thoroughly. If you have any other questions, please feel free to contact us. info@zwoptical.com

ASI385 Cameras are designed for astronomical photography. Its excellent performance and multifunctional usage will impress you a lot!

For software installation instructions and other technical information please refer to “Support” on our official website.
https://astronomy-imaging-camera.com/

Camera Models and Sensor Type

Why do 1 choose ASI385?

AS1385 cameras are designed for astronomical photography. The slightly larger sensor, extremely low mad noise, high sensitivity, and high frame rates make this new camera a very good choice for planetary imaging, it also comes with a 2.5mm all-sky lens which can provide a nearly 170° view of the sky. The excellent performance and multifunctional usage will impress you a lot!

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.

What’s in the box?

ASI385MC

Camera technical specifications

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.

Color 385 Sensor Relative QE

Read Noise includes pixel diode noise, circuit noise, and ADC quantization error noise, and the lower the better.

The Read Noise of the ASI385 cameras is extremely lower when compared with traditional CCD cameras. It is even lower when the camera is set at a higher gain.

Depending on your target, you can set the Gain lower for a higher Dynamic Range (longer exposure) or set the Gain higher for lower noise (such as short exposure or lucky imaging).

Getting to know your camera

External View

Power consumption

ASI cameras are designed to have very low power consumption which is around 180ma@5V.
You only need the USB cable to power up the camera.

Protect Window

Our ASI385MC comes with the D21 AR window, thickness is 1.1 mm Transmission chart of the AR filter.

 Analog to Digital Converter (ADC)

The ASI385 camera records in 10bit ADC and 12bit ADC. You can image at a faster fps rate if you choose to use 10bit ADC (high-speed mode). This camera also supports ROI (region of interest) shooting, and this smaller ROI has faster fps.

Here is the maximum speed of ASI385 running at 10bit ADC and 10bit ADC.

Resolution|

USB3.0

---|---
10Bit ADC| 12Bit ADC
1944×1224| 108fps| 54fps
1920×1080| 120fps| 60fps
1024×768| 170.5fps| 85.2fps
800×800| 163.8fps| 81.9fps
640×480| 268.4fps| 134.2fps
320×240| 515.3fps| 257.6fps

Binning

The ASI385 camera supports software bin2 mode. You should use 10bit ADC. We recommend customers use software binning if they don’t care about speed.

How to use your camera

There are many adapters available for this camera for connecting to your scope or lens. Some are included with the camera and others you can order from our site:
Color camera connecting drawing:

1. 1.25” T-Mount

2. 1.25”filter(optional)

3. M43-T2 adapter

4. EOS-T2 adapter

5.  2”Filter (optional)

6. 1.25” T-Mount

7. 1.25” Filter (optional)

8. M42-1.25” Filter (optional)

9.  T2 extender 11mm

Cleaning

The camera comes with an AR protect window, which can protect the sensor from dust and humidity. Should you need to clean the sensor, it’s better to do so during the daytime. To see the dust, you just need to set up your telescope and point it to a bright place. A Barlow is required to see this dust clear. Then attach the camera and adjust the exposure to make sure not overexposed. You can see an image like below if it’s dirty.

The big dim spot on the image (at right ) are the shadows of dust on the protected window.
The very small but very dark spot in the image (at left) are the shadows of the dust on the sensor.
The suggested way to clean them is to try to blow them away with a manual air pump. To clean the dust on the sensor you will need to open the camera chamber.
We have very detailed instructions on our website:

https://astronomy-imaging- camera.com/manuals/How_to_clean_ASI_camera_and_redry_the_desiccant.pdf

Mechanical drawing

Servicing

For software upgrades please refer to “Support-manual and software” on our official website.
https://astronomy-imaging-camera.com/
For repairs and consultation:
https://support.astronomy-imaging-camera.com/

For customers who bought the camera from your local dealer, the dealer is responsible for the customer service.

Warranty

We provide a 2-year warranty for our products. We offer repair service or replacement for free if the camera doesn’t work within the warranty period.
After the warranty period, we continue to provide repair support and service on a charged basis. This warranty does not apply to damage that occurred as a result of abuse or misuse or caused by a fall or any other transportation failures after purchase.
The customer must pay for shipping when shipping the camera back for repair or replacement.

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