What is the diameter (in mm) lens camera Nikon Coolpix 5400?

At 24mm lens brand, but I found this odd measure. I want to use a step-up adapter ring for 62mm.

Thanks,

Rogerio
>>> What is the diameter (in mm) lens camera Nikon Coolpix 5400?

Which one of these cameras should I buy?

Hi!
I am planning on buying a new camera; however I am not sure which one of these two is better; Nikon CoolPix AW100 or Sony DSC-TX20.
I want the camera to be waterproof, but the picture quality also has to be excellent and the camera should be good at focusing (especially macro). Also, the video recording must be good quality.
So, I am asking your opinion, which one of these would you choose and why?
>>> Which one of these cameras should I buy?