I have a 17-40L which I used with my 5DC. I have since parted with that body, and now use 7D.
To get UWA I will need something around 10mm, and I note there are zooms from Canon, Sigma and Tamron which would suit.
The Canon 10-22 is the most expensive, but I was wondering if it is worth the extra over the Sigma or Tamron.
My use would be landscapes, urban and general walk around.
I am considering selling or trading the 17-40L to go towards the cost.
My lineup then would be:
UWA 10-x
24-105L
100-400L
I would be interested to hear comments/suggestions from anyone who has used any of the
UWA lenses.


