So, to your specific issue.
- Don't use macro mode.
- Shoot from about 30-40cm away.
- Look for slightly dim lighting—too bright, and you won't see the issue.
- Try photographing text with the focus on the center and then check the edges for clarity.
- No matter what other camera settings you're using, as long as you follow the points mentioned above and the text at the edges of your picture is clear, then everything should be fine.
- I’m not using macro.
- iPhone 16 PM (subject of this post) does not focus that close. iPhone 16 does not focus until about 20” to 24” or 50 to 60cm. This is what I’ve said all along. I’ve stated, to focus at 10” to 14” inches you’ll use macro which involves the 13mm .5X which as I noted is not sharp in the corners.
- Never shoot in dim light. All smartphone cameras do poorly in low light. They produce more noise and focus less accurately and slower. There are techniques and skill sets I could teach to overcome some of these limitations, put you don’t seem to welcome my participation.
- Text in center will be sharp in center at 50 to 60cm. Corners will be less sharp but acceptable. This is because no cellphones use flat field lenses. No cellphone has corners as sharp as centers at or near minimum focus distances.
- Not sure what any of that is in reference to.
I suggest you learn more about lenses and optics. Start here,
https://www.edmundoptics.com/knowledge-center/application-notes/optics/introduction-to-modulation-transfer-function/?srsltid=AfmBOorbUbJl4NlbZAY_Mr9HVVO8McIBKsUWidjM0vBUPUYSXgt5Qrme
Get through that and you might be in a second or third year college course. That’s the simplified version that I didn’t spend 2 hours on for my students. Don’t worry, no quiz on it.
I mentioned flat field lenses, here’s a good article,
https://www.bhphotovideo.com/explora/photography/tips-and-solutions/flat-field-lenses-and-why-they-matter-when-shooting-close-ups#
Lastly, here’s an article on minimum focus distance of a lens.
https://www.the-digital-picture.com/Photography-Tips/How-to-Calculate-Lens-Working-Distance.aspx
Good luck with learning the material but your cameras aren’t defective. Your cameras changed and you didn’t. This issue is your unwillingness to learn and understand the material.
Lastly, one of my favorite quotes I shared with my students.
“The single most important component of a camera is the twelve inches behind it!”
Ansel Adams
PS: Stretch your minds!