Which kit lens for the X-T20? XC 16-50 or XF 18-55

Jared Huntr wrote:

Unmarked aperture rings are useless. It's just a half-baked attempt at being retro with no ergonomic benefit. It is much faster to change apertures by flicking a finger wheel on the body as with any pro DSLR instead of having to use a second hand to rotate a laggy ring.

If on the other hand, the aperture settings are marked on the ring, there is a genuine benefit because Fuji's don't have display on the top deck to display the aperture without looking at the EVF or LCD.

Yes, I agree that marked aperture rings are to be preferred. Many years ago when lenses had mechanical apertures rings, manufacturers (including Fuji) coped with variable-aperture zoom lenses by having two index marks instead of the usual one, like this:

A manual zoom lens with variable aperture – not the two index marks

In this picture the aperture ring is set to f/8, but this is only the true aperture at its widest setting. At the long end of the zoom range the aperture is f/11 as indicated by the green index mark, and the 210mm focal length is marked in the same colour as a reminder. For in-between focal lengths a measure of estimation is required.

Why was this simple system widely used in the 1970s but not today? Dunno. Perhaps it will make a comeback soon. Some other older technologies are returning.   Hasselblad, Kodak, Voigtlander and many other lenses had automatic depth of field indicators in the 1960s, like this:

The red markers move automatically as the aperture is changed, to indicate depth of field

This feature is starting to re-appear in lenses with LCD displays, like the Canon EF 70-300mm f/4-5.6 IS II USM.