So I got my hands on this camera a few years ago but finding information on it has been impossible and emails to QHY have gone unanswered. I've seen one old post on CN that says unity gain is around 2800 but that's all I've been able to find, so I'm not sure if that's accurate, it does produce usable results albeit they are noticeably more noisy than my uncooled Nikon D850 images are. I'm also not sure what would be considered a standard low or high gain setting for it would be like how ZWO has those settings preset for its cameras in its software. I also don't have a clue as to how I'd go about experimenting on finding those settings and even if I did I don't have the time, I work over 120 hours a week and on top of it due to being in the subtropics I've only had 4 clear nights in the past year to image and 3 of those were spent fighting a mount gremlins. If anyone could give me some pointers on using this camera I'd greatly appreciate it.
Any other QHY367 Users? need help
Nineball,
all the information and gain graphs can be found online:
https://www.qhyccd.com/astronomical-camera-qhy367/
There seems to be no high/low gain setting for this camera, only one mode available.
CS
Chris
all the information and gain graphs can be found online:
https://www.qhyccd.com/astronomical-camera-qhy367/
There seems to be no high/low gain setting for this camera, only one mode available.
CS
Chris
Hi!
I‘m using this cam about 3 years.
On the Rasa11“ (f2.2) i take gain 1, on C11 (f7/f10) i take 150-200 about.
An also importatnt setting is the offset. Normaly the offset changes with the gain, but at my 367c the best offset ist 25 for all gains.
So you can try to take a gain between 50 and 200 and set the offset to 25. It should work.
Good luck & clear skies
Mario
I‘m using this cam about 3 years.
On the Rasa11“ (f2.2) i take gain 1, on C11 (f7/f10) i take 150-200 about.
An also importatnt setting is the offset. Normaly the offset changes with the gain, but at my 367c the best offset ist 25 for all gains.
So you can try to take a gain between 50 and 200 and set the offset to 25. It should work.
Good luck & clear skies
Mario
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Mario Zauner:
Hi!
I‘m using this cam about 3 years.
On the Rasa11“ (f2.2) i take gain 1, on C11 (f7/f10) i take 150-200 about.
An also importatnt setting is the offset. Normaly the offset changes with the gain, but at my 367c the best offset ist 25 for all gains.
So you can try to take a gain between 50 and 200 and set the offset to 25. It should work.
Good luck & clear skies
Mario
What is offset? I understand gain is somewhat analogous to ISO but I dont understand what offset does
I’ve had the 367 for a few years and only use it off and on as a “Camera 2” since most of the time I’m shooting mono with the QHY600M.
That said, I do have some experience with it and yes, Unity gain on this is surprisingly high at 2800 according to QHY. This is odd to me since that’s more than halfway up the complete scale available in the driver software, whereas on the 600, unity gain is 26, barely off the bottom. The benefit of shooting at unity (as best as I understand it) is that it avoids a certain kind of ‘read noise’ as values are interpolated on their way out of the camera, rather that doing a straight transfer with no ‘guessing’ on the part of the software.
What is Gain? Gain is used to keep the darkest pixels in a shot from being down at actual zero values. Once a pixel is recorded at zero there is nothing you can do with it after that. Gain is an offset to the bright that keeps the darkest things just above zero so they’re still useful without sacrificing dynamic range.
My big complaint with this camera is that the colors are pretty bland and you really have to go attack them with heavy saturation during processing to get nice colors. That said it’s a quality camera and can be useful.
I’m putting this up on a new rig in the backyard soon and I’ll have some much more hands-on commentary in a month or so.
Bill
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Nienball · Jul 10, 2025 at 04:22 AM
So I got my hands on this camera a few years ago but finding information on it has been impossible and emails to QHY have gone unanswered. I've seen one old post on CN that says unity gain is around 2800 but that's all I've been able to find, so I'm not sure if that's accurate, it does produce usable results albeit they are noticeably more noisy than my uncooled Nikon D850 images are. I'm also not sure what would be considered a standard low or high gain setting for it would be like how ZWO has those settings preset for its cameras in its software. I also don't have a clue as to how I'd go about experimenting on finding those settings and even if I did I don't have the time, I work over 120 hours a week and on top of it due to being in the subtropics I've only had 4 clear nights in the past year to image and 3 of those were spent fighting a mount gremlins. If anyone could give me some pointers on using this camera I'd greatly appreciate it.
Hi! In reality, there is no such thing as unity gain. You have a high-end camera here that can't be compared to cheap Chinese cameras. Set the gain so that your images are well exposed at the desired exposure time, but not overexposed. On my Rasa11, this is Gain 1 and Offset 25; on the C11 (2800mm), I use Gain 500-1000. Also Offset 25. The relationship between gain and offset is important! With the Qhy367, it's very "linear." Offset 25 works for me up to Gain 4000, after that, Gain 26. Regards, Mario P.S.: It's been cloudy here in Austria for some time now, too :-(
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