The engraved laser logo at the inside of Rolex sapphire crystal is Rolex flying saucer, some have seen it and some says it never exist. It's very hard to find and is a great way to see if it's a genuine Rolex crystal at the watch. It's on every modern spo...
and the Laowa for more extreme close up's. This lens is completely manual and very tricky to use it takes some time and patient to get what you are looking for.