Hi Brad,
I actually stand corrected, CMOS do have a form of hardware binning, but it's not the same as CCD & is limited in access.
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After comparing CMOS BIN and CCD BIN, let’s look at another concept of BIN- hardware BIN and software BIN. Hardware BIN, as the name implies, is to merge the pixel with hardware, usually refers to the completion of pixel merge on the chip, due to the different chip structure, CCD can do this, but CMOS cannot. CMOS hardware BIN is more like pixel skip. The frame rate will be faster by pixel extraction, but the signal-to-noise ratio is limited. Generally, we apply it to scenes that require high frame rates, such as shooting solar system objects. For deep space shooting, we recommend binning with software on CMOS cameras.
Here we also defines hardware BIN as pixel merge on CMOS sensor, and software BIN as pixel merge in SDK in software. Please notice it is not the same BIN as CCD on chip BIN.
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Quote:
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In our ASCOM and ASIImg, ASILive software, the default BIN is software BIN, only ASICAP have hardware BIN option. You can find this option in ASICAP->Control->More (provided that the camera supports hardware BIN).
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Source:
https://astronomy-imaging-camera.com...-fundamentals/
Still learning,
Mark