FAQ

Naming Rule of ASI Cameras

Applicable Product(s) : All ASI Cameras

Description: Help you to understand naming rules  of ASI cameras.

What should I prepare?

Buy an ASI camera 😀

Why the cooler does not work?

Applicable Product(s) : ASI Cool and Pro Cameras

Description:  Why the fan does not run? Why the temperature does not go down?

What should I prepare?

  1. Install ASI Camera drivers
  2. install latest capture softwares

Answer:

  1. Make sure a 12V DC power cable is connected and the red LED is on. You can use an AC-DC adapter, or a 9V-15V battery. And the connector must be a 2.1×5.5mm center positive standard. The red LED indicates that the external power supply works.
  2. Check the fan runs normally .(The fan only runs when you enable the camera cooler in compatible software. The fan will not run when the cooler is not powered .)
  3. If the cooling temperature does not change, but the cooling power rise and reach 100%, and the camera body is warm   the Temperature sensor probably is damaged.
  4. If the cooling temperature does not change, but cooling power rises and reaches 100%. And camera body does not getting warm, the power chip probably is damaged.
  5. Try another power adapter to check.

Why is the preview screen completely white but the FPS appears to be normal?

Applicable Product(s) :All ASI Cameras
Description: When you use ASI camera for the first time, you may bump into some problems, this post will help you get familiar with your camera ASAP.

What should I prepare for imaging?
Install ASI Camera drivers
Install latest capture softwares
Q: Why is the preview screen completely white but the FPS appears to be normal?
A: It may occur due to the overexposure. You need to reduce the exposure setting or reduce the gain setting until you can see the image on the screen. If you can see the fps changes ,then the camera is working properly.

Why the preview screen is black and the fps is “0”?

Applicable Product(s) : All ASI Cameras

Description: When you use ASI camera for the first time, you may bump into some problems, this post will help you get familiar with your camera ASAP.

What should I prepare for imaging?

  1. Install ASI Camera drivers
  2. Install latest capture softwares

Answer:

  1. Please try to slow down the capture speed by reducing the “USB Traffic”. Also try to connect the camera to your PC directly without a USB hub or extender if reducing “USB Traffic” still does not work.
  2. Use another USB cable and try again.
  3. Use another USB port of the computer and try again.
  4. Use another computer and try again.

Which configuration gives me maximum FPS?

Applicable Product(s) : All ASI Cameras

Description: Some settings will cause your FPS to drop below peak rates, this post will tell you how to reach maximum FPS for your camera.

What should I prepare?

  1. Install ASI Camera drivers
  2. Install latest capture softwares

Answer:

  1. Make sure the camera is connected to USB3.0 port if it’s a USB3.0 camera. Check that the camera is recognized as “via USB3.0”. (Device Manager in Windows) Update the computer’s USB Host Controller driver if your port is USB3, but camera is not showing up as USB3.0 device.
  2. Make sure that the “High Speed Mode” is on in the capture software, location varies by software.
  3. Adjust “USB Traffic”, we recommend 80-90%. This value depends on your computer, higher percentages require more resources to be successful and not drop frames.
  4. Exposure time limits FPS, your frame rate will never exceed your exposure time settings. For example, the FPS will be 1FPS when the exposure time is 1 second, 4fps at .25 seconds, etc.
  5. The write speed of an SSD (solid state disk) is significantly faster than an HDD (spinning platter traditional hard drive). SSDs usually have a buffer of about 1GB, over a 1GB data steam and the write speed of  an SSD will slow down.

Reason of Field Tilt problems and how to solve it

Applicable Product(s) : For All ASI Cameras Description: Field tilt problems usually happen in imaging. Optical axis, flattener lens, adapters, and sensor tilt are all causes of field tilt in images. This post is to help diagnose which issue is causing your field tilt problem.
What do I setup to test? Your imaging setup is connected to the computer and there are many stars in the field of view.
Q: How do Itest if a tilt problem is caused by my telescope or by my camera?
A: Take an image with your camera then rotate the camera 180 degrees (the telescope telescope doesn’t move). Thentake another image of the same field of view. Analyze the images with software, such as CCDInspector 2.5.3.
If the field has an identical pattern after rotation, then the camera has a tilt problem.
If the field has the same problem, but it has rotated 180 degrees, the telescope has a tilt problem.

Q: How to make sure tilt problem caused by adapters?
A: 1. Remove suspect adapters, connect the camera directly to the telescope.
2. Try another adapter.
3. Take another set of images to test if the problem is gone
Q: I use a field flattener or a flattener/reducer, but I see coma in the corner of image.
A: 
1. Usually this is caused by incorrect back focus (spacing between the reducer and camera sensor). Use suitable adapters make sure your camera is at critical back focus for that flattener or reducer.
2. Your image circle for that flattener or reducer is smaller than the camera sensor.

How to get the best performance from your cooled camera?

We always got feedback from the customer that the camera cannot cool to the advertised temperature

Here may be the reason the camera cannot cool so much:

  1. Misunderstanding: 30 delta degree means 30 degrees below ambient instead of -30 °C.
  2. Make sure you plug in the 12V DC power supply and the LED is on which mean there is power.
  3. Make sure the 12v power supply can provide enough power for cooler, we recommend 12V @3A and up, such as 12V@5A is ok too.
  4. The sensor emits more heat when run video streaming mode, so cooler cannot cool it so deeply, you can cool it deeper with long exposure mode.
  5. The cooler runs effectively in summer than winter, so if it’s already 0 degree, the camera maybe can only cool to -20 degrees.
  6. If you use ASI071, ASI094, or ASI128 cameras, you can turn off the anti-dew function to maximize cooling capability.
Why does “Unknown device” show in the device manager after connecting the camera?

Applicable Product(s) : For All ASI Cameras Description: When you use ASI camera for the first time, you may bump into some problems, this post will help you get familiar with your camera ASAP.
What should I prepare?

  1. Install ASI Camera drivers
  2. Install latest capture softwares

Answer: Because the driver was not installed properly. Try to install the driver again. You may need to stop any anti-virus software to run the installer program. (
NOTE: Make sure you download the driver from the ZWO official web site or from the CD-ROM to prevent any malware problem!)

Please update the driver manually if re-installation doesn’t work.

Right click the “Unknown device”, choose the “Update Driver Software…”option and choose the driver directory. Normally, the driver directory is under:
C:\Program Files (x86)\ZWO Design\ZWO_USB_Cameras_driver\

Why won’t my camera run continuously on a laptop without external power?

Applicable Product(s) : All ASI Cameras
Description: When you use ASI camera for the first time, you may bump into some problems, this post will help you get familiar with your camera ASAP.
What should I prepare?

  1. Install ASI Camera drivers
  2. Install latest capture softwares

Answer:
Due to the power saving mode of your laptop (mostly by default option), many laptops allows the USB power to suspend operating when your laptop enters to Low Power Mode. You need to disable power saving option of the USB port:
Disable power saving option of the USB port