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INDI Library v1.9.3 Released (11 Nov 2021)

Bimonthly Stable INDI Library release introduces new drivers and fixes for existing ones. Some highlights:

risingcam imx571

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Replied by Patrick on topic risingcam imx571

I don't understand all in this paper, but it seems that there is all explanations for all parameters that are in the control tabs.
www.imagesensors.org/Past%20Workshops/20...019%20Papers/R06.pdf
I will try to read, re-read it as long as I can't understand all (if I succeed to).
Maybe HDR combine low and high gain to give a better result. Who knows ?

Another good information. The binning modes are usable with this cam. It looks like there is a matrix arrangement that allows it.
Last edit: 6 months 5 days ago by Patrick.
6 months 5 days ago #71714

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Replied by Paolo on topic risingcam imx571

The more I look at the graphs, the less I understand.
Why would they suggest to enable HGC at gain 18db (900)?
According to the graphs, everything gets really worse at such high gain compared to, for example, gain 3.95db.
I'm really puzzled...
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
5 months 3 weeks ago #72173

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Replied by Paolo on topic risingcam imx571

I asked them about the amount of memory and how to use the graphs they provided, because it seems that for both LCG//HCG the best would be gain 0. The reply was:

Our Camera Memory is 512MByte
LCG: Low Conversation Gain, Low Gain, low noise, low brightness, better image quality HCG: High Converation Gain, High Gain, more nosie, higher brightness, this is good for low light condition No matter LCG or HCG, 0 Gain can get better image quality

Engineering should come up with a standard version for all customers, because they said a different thing to another user
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
Last edit: 5 months 3 weeks ago by Paolo.
5 months 3 weeks ago #72185

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Replied by Patrick on topic risingcam imx571

Do you know what is the wrong info that have been given by Risingcam engineers ?
5 months 3 weeks ago #72188

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Replied by Paolo on topic risingcam imx571

Yep, that HCG should be used with gain 900 and greater. But looking at the graph, I'd never use gain 900 with HCG on this camera. It simply doesn't seem to be the best (again, according to the graphs).
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
5 months 3 weeks ago #72190

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Replied by Patrick on topic risingcam imx571

What I have understood is that the threshold of 900 is the limit where you switch from LCG to HCG. The only advantage is to get back to a full dynamic when switching from first mode to second one. It seems that for cameras like Zwo or QHY this is transparent for user because they switch automatically between the two modes.
After the choice of LCG or HCG is up to the user. Maybe for lucky imaging or use of filters like L-Extreme from Optolong HCG might be better than LCG.
5 months 3 weeks ago #72198

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Replied by Paolo on topic Re:risingcam imx571

Actually, there's another important advantage: to reduce the read noise. If you look, for example, at the 2600mm graphs, you'll see that at gain 100 the read noise is half that of gain 0.
If you look at the Risingcam's graphs, you'll see that gain 0 is always the best option for both LCG and HCG.
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
5 months 3 weeks ago #72200

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Replied by Paolo on topic Re:risingcam imx571

I've made a comparison between the ASI2600MM, QHY268M and RisingCam/Altair IMX571 Mono with the numbers found on their respective official websites and, where values were missing (qhy268m), from the SharpCap sensor analysis found on CN:

File Attachment:


To me it's even more clear that the RisingCam camera should always be used at gain 100 (which is gain 0 on other cameras).

Legend:
RC = RisingCam
(number) = Ultra low noise mode, e.g. (2.35)
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
Last edit: 5 months 3 weeks ago by Paolo.
5 months 3 weeks ago #72222

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Replied by Paolo on topic Re:risingcam imx571

A couple of other params I don't know how they should be set:

HCG/LCG gain ratio
Offset

Someone has any idea?
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
5 months 3 weeks ago #72223

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Replied by Patrick on topic Re:risingcam imx571

For the offset, I guess you can take a look here:
www.qhyccd.com/index.php?m=content&c=ind...show&catid=23&id=226

for the HCG/LCG gain ratio I don't know, maybe this could help

"Hello Pat  Engineer said:  HCG/LCG gain ratio 3.05 engineer don't understand what is Threshold? Could you explain it?  Eddie    Chengdu Rising Technology Limited8-4 Shengfei Town, huanghe road, shuangliu, chengdu, sichuan, China
"
 
Last edit: 5 months 3 weeks ago by Patrick.
5 months 3 weeks ago #72225

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Replied by Paolo on topic Re:risingcam imx571


Nice! I must say that their support is really good! Very friendly and fast in answering all questions I asked them! Kudos to them
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
5 months 3 weeks ago #72227

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Replied by Paolo on topic Re:risingcam imx571

FYI, I sent the latest firmware to Jasem yesterday, and this morning he pushed it to the repo :)
If someone has the mono version, now it should work fine.
RPi 4b 4GB with latest Stellarmate OS
iOptron CEM70 + iOptron SkyGuider Pro
Nikon D7500 (stock)
TecnoSky AG70 f/5
APM Image Master 50mm f/4.1
ASI290MM-Mini
Berlebach Planet + Berlebach 312 Astro Tripod
The following user(s) said Thank You: Patrick, alacant
5 months 3 weeks ago #72262

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