[Brightcolours]

I'm talking about size of an UWA here. Sure, it's not 12 equiv, but others have compared it to 16-35, so why not a 18-36?

Now, I now perfectly well it's equivalent to a 18-36 f8-11 and that's the beauty of it: such a lens DOS NOT EXIST in any other system.

That's what matters.

When travelling and shooting landscapes, I'm perfectly happy with a slow lens as I'm shooting landscapes (which don't move all that much ;-). With Olympus' IBIS you can shoot this thing at around 1 sec. So again, a combo such as an E-M5 II + Oly 9-18 doesn't exist ANYWHERE else. For the size factor it's simply amazing, regardless of what you think.

It is totally ok for you to appreciate that Olympus lens, I just found it strange to bring it up in a thread about a wider, "fast" UWA. The 16-35mm only came up because someone thought they had confused its size with that of the "fast" and also wider Sony FE 12-24mm f4.

 

I know that such a slow lens does not exist anywhere else, but I am unsure what the beauty of that quite extreme small maximum aperture is. 

Whether something like it does not exist anywhere else?

The Canon EF-M 11-22mm f4-5.6 IS STM is pretty close in size (just 4.5 mm wider and 8.5mm longer) and focal range:

 

Olympus ED 8-16mm f4-5.6 is a 18-36mm FF equivalent

Canon EF-M 11-22mm f4-5.6 is a 17.6-35.2mm FF equivalent

 

It is a tad faster too: Olympus f8-11 FF equivalent and the Canon f6.4-9 FF equivalent.

 

The Canon has IS vs the IBIS of Olympus.
http://j.mp/2xmm5S9

It seems a lens like that pretty much does exist somewhere else?