scorpionz

If you need the low-light and almost-macro-like capabilities, then get the 16, or else the 10-24 will be a more versatile option. I couldn't get both because $$$, and I wanted a lens which could be used for street, landscape as well well as astrophotography. I ended up getting the 16. I almost exclusively use it at 1.4 or 2.0 and couldn't be happier with the results. Both are phenomenal lenses and you can't go wrong with either.

35/2 You've got an impressive/insane number of lenses! Since you're averse to carrying only the 18-135, if I were to pick from that list, I'd do the 10-24, 35/2 and 55-200. For what I shoot, I'd rarely ever use the 55-200, but given the diversity of landscapes you will encounter, might be worthwhile carrying it. As you noted earlier, dust is/will be an issue so I would be very wary of changing lenses often.

I really wish I had the 16mm when I traveled, 18mm was just too narrow in some of the beautiful alleys & smaller locations, especially in Marrakech. If I were traveling again, I'd do the 16mm and the 35mm, never felt the need for any zoom.

I couldn't get any good answer to this question so ended up trying my luck using a generic adapter. I got one called the K&F concept adapter on Amazon. Here's the link - https://www.amazon.com/gp/product/B00OONK89W/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1 It has a nice aperture ring, construction is solid and works well on my Nikon 50/1.8. No complaints here.