The portrait mode the iPhone 15 pro has is basically the same thing as the Focos app that does the same thing and has been around for years.
Also the multiple lenses it “has” are just cropped areas of the 48mp sensor that simulate a longer focal length and reduces quality (less megapixels) the more the image is cropped. You’ll go from 48mp to 12mp fairly quickly as the image is cropped tighter.
Why not shoot everything in 48mp in ProRAW and crop as needed in post which delivers the same results. Apple makes it sound exciting and new, but it’s just image cropping. If you recall, this was done with the 14 pro with the use of a 12mp image for an additional 2x camera. It’s ok, but image quality isn’t as good. I’d rather put an actual external lens over the 1x to get closer and maintain 48mp. For example the Beastgrip 1.7x lens which draws in light and offers more resolution. It offers amazing results, but it’s not for everyone. Only for the serious photographer and video enthusiasts.
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Yes the 48mp sensor in the iPhone 15 Pro/max is new, but is it actually better? Maybe just a little…. Noticeable but not dramatic compared to the 14 pro series