Risingcam IMX571

[RobertH]

Hi,

I have added my cam manually but when i select my cam i get 0 objects meet visibility camera.
Criteria are set to: sun, moon, planets, any quality, above and below horizon, detectable.
I only get object if i set the criteria to Any SNR.
When i select another camera from the list i get a lot of visible objects.
Maybe it has something to do with the Quantum efficiency settings ?
How do i get the Quantum efficiency settings for this camera?

Thanks,

Robert

[theskyhound]

Upload a screen capture of your Camera dialog so we can look it over.

[RobertH]

Here is the screen capture.
I'm looking for the Quantum efficiency settings for this camera with the Sony IMX571

[RobertH]

Upload a screen capture of your Camera dialog so we can look it over.

Please have a look at the settings for this camera.

Thanks,

Robert

[theskyhound]

Upload a screen capture of your Camera dialog so we can look it over.

Please have a look at the settings for this camera.

Thanks,

Robert

[theskyhound]

Below is the relative spectral sensitivity curve for the IMX571 sensor. To convert this to absolute values, we multiply each relative value from the graph by the maximum QE, which is 80, and then divide by 100. For example, at 550 nm, we read 75 from the graph, multiplied by 80/100 gives us 60. So we enter 60 at 550 nm. Repeat that for each of the sample wavelengths.

   

I suspect the your issue is more about the Gain settings. There are gain graphs outlined here:

https://www.aliexpress.us/item/225580117..._shipto=US

Pick some Gains that are practical to use under different circumstances. Beware that the Full Well in these graph is not the true, physical, Full Well, which is what SkyTools needs to know. Its more of a "practical" or "effective" full well value that takes into account dynamic range clipping from the number of bits used in the calculations. It looks like the unity gain is around a gain value of 114.

[RobertH]

I don't have the 0 objects issue anymore.

I have made a sensor analysis (see below).

Is it possible for you to give me the corresponding quantum efficiency nm values so i can add this camera to the list to share with other sky tools users.

[theskyhound]

The corresponding values can be read from the graph I provided, and applying the simple formula. I can do that for you, but its going to be a while before I can get to it.

I think the gain settings are a much bigger problem. Sure, you have that table of results. But looking at the specs for this camera, it appears that they define the relationship between Gain and Gain Value (I hate this terminology!) differently from the ASI cameras (yay). If so, I don't see how we can easily set up the Gains in SkyTools. Unless you have an insight that I don't? Otherwise, I'm going to have to spend some time figuring this out.

I need a better way to do this anyhow, given how things appear to be changing with new cameras, and how difficult it is becoming to obtain the unity and G0 gain values (they used to just publish them...). There will be some major changes coming in how the Gains are set up in Version 4.1, which I am working on right now. So with an eye toward a better way to do this, let me spend some time figuring out how to enter your gain settings in SkyTools 4.0.

[theskyhound]

Hello,

I have just released an update that simplifies the entry of gain settings for variable gain cameras, which will also allow the proper gain settings to be entered for the Risingcam.

Here is the full process for setting up the gains for this camera:

1. Update SkyTools Imaging to version 4.0j R20. If you aren't prompted, select Updates, Registration and Feedback from the top level Setup menu. Press Check for Updates to begin the update process.

2. Select up to five gain settings and corresponding offsets that you wish to use with your camera. Use the graphs provided with the camera specs to make your choices.

3. Open your Imaging System on the Imaging Systems dialog and click on your camera.

4. If you have any gains set, select each one in the list and click Delete until no gains are listed.

5. Click Add. This will open the dialog where you can enter one gain at a time. Type the Gain Selection into the label field. Enter the actual gain in e/ADU that corresponds to this gain selection (from the graph or table). Enter the corresponding offset that you intend to use with this gain setting. Click Ok.

Enter up to five Gain Selections. These can be either LCG or HCG modes. Note which mode in your Gain label.

Example, "LCG 251" (label), 0.19 (gain), and a good offset for that gain that will keep ADU from going negative.

[Gene3]

Hi All,
I am really new to skytools4 (imaging) and trying to get through the setup. I have a Moravian C3-26000 (IMX571). What do I enter foo the Dark Signal and the various quantum efficiencies? I tried following the graph and example for 550nm but I do not see how you got 70 from the Y axis. Please help me to complete the set up. Thank you - Gene