Originally posted by RGlasel I have taken several photos of streets with the DA 15, but only these two have multiple people in them. Personally, I think there are limited uses for this lens (pun intended) if you want to include people in your photo; the edge distortion really does a number on people on the sides and such a wide field of view spreads out a crowd and produces unflattering portraits. But each to their own, I guess.
Not a special thing of the DA15. It‘s about distortion across the whole angle of view starting from the middle of the image circle to the borders of the frame. On APS-C 28 mm should show least distortion over the whole image, i.e. sensor area. 15mm compared to 28mm yields strong distortion at the borders,
It‘s a personal decision where you draw the line for too much „people distortion“ and as already said by Jonathan and Paul depends strongly on your composition. Position people more to the middle if you want them less distorted. The wider the lens relative to normal FL the more important this rule. While composing you should be able to check what‘s acceptable for you - indepently from the used FL.
Hint: „normal“ FL @ Full Frame means 43mm. 15mm @ FF relative to 43mm yields to even more distortion across the whole frame. So you have „to move“ people more to the middle of the frame compared to using it on APS-C. Everything is relative … use a camera with 1“ sensor or crop to that area and 15 mm nearly is the normal FL … and ~16 mm is.