Well, I may be mis-interpreting this because I'm not an expert in all this.
But if you go back to the information released by Sony that I've found: http://www.sony-semi...mx294cjk_e.html you'll note that Sony talks about having two high-speed interfaces which include the CSI2 and the SLVS-EC.
For the IMX294 sensor with the 4:3 aspect ratio the 14-bit frame rate is listed as being 24 FPS without specifying either CSI2 or SLVS-EC.
If you go to 12-bit it will give you a frame rate of 60 or 30 for SLVS-EC and CSI2 respectively.
If you go to 10-bit you get 30 and 15.
So maybe ZWO decided just to implement the 14-bit at 24 FPS and it is ending up actually being just a tad bit slower?
I don't know why the frame rate is actually slower at 10-bits but it would seem to be so?
The upshot is that you aren't going to get a truly high frame rate from this camera. Personally, that is perfectly fine with me. It would be awesome if ZWO or maybe QHY were to implement that 60 FPS at 12-bit but I have a feeling it would choke even an SSD?
I'm sort of assuming an ROI can be defined but I'm not sure that the SoC is going to pump out a faster frame rate even if that were the case.
I'd note that the PAL system happily uses a frame rate of 24 or 25 FPS and that the NTSC standard seems to be 30 FPS? The designers of this sensor even state that this is intended for security systems which I don't think are often driven to high frame rates.
Not being an expert at the different standards I could be way off-base but it could be that the sensor designers set up the SoC to output frame rates which were compatible with existing commercial standards and have little to no interest in juicing up their SoC to output a frame rate which I don't think many security systems want to handle.
I know that the surveillance folk I talk to around here are generally in the NTSC camp for almost all their applications. There are some specialized situations where they are using very high frame rates at a significant cost but that is by far the exception rather than the rule.
Anyway, I'm suspecting ZWO is happy with the 24 FPS since that should work just fine for what most of us would want to do with that camera.
Edited by OleCuss, 25 September 2017 - 06:52 PM.