Jim Z: yes, they display correctly in irfanview - just not in Photos app; i was doing a demo/presentation at the time, and didn't have irfanview installed (didn't think i needed it) and assumed ...

While much of the technology behind digital cameras has changed since the first prototypes, one feature that’s nearly as old ...

There's a lot to learn about image files on the command line, from verifying file format to finding out where and when photos were taken and maybe even getting an unusual view of what they look like.