This iPhone6/Olloclip macro, despite the apparent bad quality, was extremely difficult to do because the writing is inside of the watch-case back under a thick sapphire crystal, and reflections were everywhere. The actual lettering is approx. 2/3 to 3/4 of one mm tall.
iPhone6s-plus, f2.2, 1/15 sec. handheld, ISO 32.
View attachment 27760