I am trying to decide on which direction to take for UWA on cropped sensor. I currently do not shoot shorter than 16mm but would like to explore what new opportunities could open up for me if I started to look at things with a new perspective. I currently have both the 16 2.8 and the 20 2.8. I use the 20 mm fairly frequently, but have hardly ever used my 16mm at all. Because I already own these, I was thinking that the VCL adapters might be a good route to go, but since I tend to be more comfortable as a zoom shooter, I began to think that the 10-18 would be a better choice. I was thinking that if I go the zoom path then I would try to sell the 16 to help fund it. Alternatively, if I go the VCL direction, I could use them on the 16 and the 20 for quite a wide range of options. What does everyone think?