I have no idea what this is and does it go beyond the 104 megapixels or 108 megapixels. I'm not having luck with my camera I have no idea how it works. I had no problem with my Nikon d700 but nothing seems to work out well when I use the camera on the phone. Yes I've taken some pictures simple ones. Anyway can anyone suggest a good book or video or seminar for learning how to use the camera on the S21 Ultra. I understand the principles of photography, I understand that the field, I understand what opening the aperture means and what speeding up the shutter means and how that relates but there are so many things that have to be adjusted here I have no idea what I'm doing and I just need some basic instruction. So, if you found some good sources of knowledge I'd appreciate hearing about it. Also how large do 104 megapixel files get are they really necessary with the small plastic lenses we have on these cameras?
Expert Raw is an app which allows you to use the Pro Mode with all 4 lenses to take photos in RAW (.dng) and auto-HDR .jpg's
It does not affect mega pixels and as a matter of fact takes photo's using 12mp and 10mp. The 108mp resolution with this tiny sensor doesn't grab enough light and most of us never use that feature.
next, you cannot compare a D700 to any phone camera as no phone camera will give you the consistent quality that virtually any DSLR will...even with cheap lenses.
Your S21U has 4 lens each with a different speed. F2.2, F1.8, F2.4 and F4.9 in ascending order of magnification. All of these lenses can be used by the Expert raw app in Pro Mode.
Especially for Stills or low movement photos, Expert Raw is excellent in my limited testing.
As far as I know there is no book that really explains anything more than you can find out reading the manual. There are Youtube videos on some specific subjects like astrophotography and landscape for the S21U, and probably more.
What you cannot do with the S21 Ultra is adjust your aperture which is the main adjustment you can use on your D700 in getting that nice Bokeh and shallow or deep Depth of Field. You can however simulate that blurry background using the portrait mode.
In my experience, even with being an avid hobby DSLR user, I find that these tiny lenses and limited controls require a lot of practice in order to tune your DSLR skills so that they are effective with a phone camera.
If you have specific questions I'll try to answer them as best as I can.