AFishEye

@Mako109
Not true!
Your purchases on the app store are connected to the camera number and you can reinstall, if needed, as many times as you wish (never lost any after any firmware update)
Also,...

Agreed, but it may become an exercise in futility. I have high quality UV and ND filters that work perfectly fine without the Xume on my UWA. I’ll have to replace both just to accommodate for this...

These things are convenient mainly for video shooters as it makes placing and removing ND filters a snap.

They seem to work fine on standard focal lengths; however, it vignettes like crazy on UWA....

fair enough; good travels!

Who is “us hikers”?
I am “us hikers” and I will take a tiny RX100 (4 or 5) with a pop up EVF and 3 extra tiny batteries over a large camera with a big battery any time I head to the great outdoors....

deleted

@Thermidor
The 28-135/4 PZ is a cinematic lens (not to be confused with the 18-105)

@Rooru S
One of the new features of this super 35 lens is a true mechanical zoom (vs the fly-by-wire zoom on the FF 28-135). As you know, this is a big deal and does add to the overall cost.
"Both...