Here's something fun I was playing with earlier, which could be of interest to those who travel with small cameras but want a little more out of them. In this setup, i'm adding a Raynox Ultra Macro Adapter to the RX100 Mark II. Since this version has a hot shoe, why not throw on a Macro LED light? Here's the results from my setup.
This is the closest the Sony RX100 Mark II can focus on a US Quarter.
Here's how close I can focus with the Raynox Macro Adapter.
Now i've tried a variety of other Macro filters (diopters), and various techniques, these Raynox Adapters I feel have the best quality smallest, and simplest setup. FYI, In order to use this Raynox adapter it needs to attach to a 'zoom' lens with a threaded filter. You need to zoom into the adapter to get the macro effect.
Raynox Super Macro Lens Adapter
The Sony RX100 does not offer a threaded filter, so to mount the Raynox you would need to grab the PNC MagFilter. The MagFilter can be used on virtually any point-n-shoot camera that lacks filter threads. A very thin metal ring adheres to the camera's lens and a special Magnetic Filter Holder quickly snaps in place. The design keeps your compact camera 'compact' as it should be. Not only handy for this Macro adapter, but to also add CPL, ND, or other creative filters.
PNCGear MagFilter System 52mm, 5mm, 58mm Threaded Adapter
The camera is literally on top of the quarter so it blocks light, plus it's a good idea to stop down your aperture in macro mode. Adding an LED Macro light helps shed light on the subject. It's a bit spotty, but i'm using this super cheap flexible LED Macro light (found here).
Flexible Shoe Mount LED Macro Light