Just a quick report of my first impression of an ASI224 camera with IMX224 cmos by Sony. Unfortunately, I have had pretty bad weather last weekend, and the few deepsky images that I did make still need to be processed, so for now this is just a post with some technical details.
The camera is a color camera, unfortunately, there is no monochrome version of the CMOS available. The camera has 1280x960 pixels that are 3.75um, and an USB3 interface. It can do about 150FPS in full res, faster in ROI. IR sensitivity is better than ASI120/174.
I measured a read noise of between 1.5 and 0.75 electrons (Depending on the gain used).
This is extremely low! (ASI174 and ASI120 has between 6.5 - 3.5e, ICX618 between 14 - 7e). This makes the camera very interesting for short exposure deepsky, or imaging very faint targets without having to fall back to longer recordings (and less 'sharp' frames), or for example Venus in 1000nm IR). CH4 imaging at 889nm should be possible without bayer grid artifacts, so you can use the camera as a monochrome camera then, as all pixels show very similar response above +- 810 nm.
I only made a few images over the weekend, as the weather was poor and there was a LOT of wind (a big Dob out in the open does not help here). I did one test run of M57 with 0.1 second exposures, because anything longer resulted in blurry frames due to the wind. I also did some 1 second exposures of M51 to try and get some color into my M51 image I made a week earlier. I still need to process the results, but for the M57 I need to change AutoStakkert!2 as aligning thousands of these frames proved very tricky. But I was really impressed with the sensitivity of the camera so far, and got quite a lot of detail from the M57 image (not deep, but very promising for just 0.1 second exposures).
I hope to do some more actual imaging with this camera in the coming months. I'm sure Sam will come with more details regarding this camera soon, as well.