I started off with the 32HR and the 90HRSW. ... After using those two, I got the 50HR and that one is also superb, but for whatever reason I don’t use it as much as the 32HR or the 90HRSW.
Interesting how Apple went about. First, there one lens with about 28mm (equivalent) focal length lens, then with the iPhone X two lenses 26mm and 52mm, and now with the iPhone 11 Pro three lenses: 13mm - 26mm - 52mm.
Apple surely must have invested extensively in research of which focal lengths to use and with what spacing.
I presume the exact geometric spacing of the focal lengths may be due computational (scalability) reasons.
Of course, we are limited what Rodenstock makes available.
Wouldn't be surprised if the Digaron-W 32mm and the Digaron-S 35mm, like Apple's 26mm, are the most used focal lengths, and perhaps Digaron-W 50mm/70mm and Digaron-S 60mm, like Apple's 52mm, the second most used focal lengths. Third most used focal lengths, Digaron-S 23mm or Digaron-SW 90mm? Wonder how Apple's 13mm lens will resonate with the photographic community.