And now to tweek the subject...Just bought an RX100 Mark IV...any housing recommendations ?
1) Meikon/SeaFrogs - least expensive, rated to 60m, but lacks access to rear dial.
2) Sony MPK-URX100A - similar to Meikon, also lacks access to rear dial.
3) Fantasea - for about $100 extra over Meikon/Sony, you get access to rear dial, plus the option for some extra accessories like a screen magnifier hood.
4) Ikelite - least expensive housing for RX100 series with a vacuum valve option, but ergonomics are not as good as Fantasea. Note: avoid the 'action housing', that one won't let you trigger strobes.
5) Nauticam - 100m rated depth, widest accessory set (including magnifier hood, vacuum valve, shutter trigger extension, etc), aluminium construction (lower chances of fogging), but at the highest price - $1k for housing alone.