Just one combined Main stream (the image is stitched together at the camera), although the camera also has substream available.
I purchased the IPC-PFW8802-A180 version. Technically, mine is 4 separate 2MP streams. Each 2MP imager appears to be rotated 90 degrees. Stitched image is 4096x1800 total resolution but
low light performance is more like 2MP starlights and about twice as good as IPC-PF83230-A180. I think you will get much noisier night time video, plus consume many times more disk space running the IPC-PF83230-A180. but if your primary concern is daytime, yeah that would look amazing. The multi-imager cameras are also PoE+(802.3at)(Class 4) so be aware standard low power POE won't power them up. Thanks to some good early advice on these forums I have all POE+ switches but you could also just add a POE+ injector for this camera.
@EMPIRETECANDY Andy is the local trusted Dahua supplier. This camera was special order so it took a few weeks to arrive (delayed further by COVID issues in Asia).
When he has stock, you will get crazy fast service from Andy. I just ordered a different camera from stock Jan 22, shipped Jan 25, arrived Jan 27 (Hong Kong to Colorado,US in 2 days so).