Originally posted by Jonathan Mac I'm not sure about rendering but the 16-50mm has a mediocre reputation optically and a bad one for needing repairs - from what I've read I think it's the lens where SDM failure most commonly strikes.
I bought my DA*16-50/2.8 in 2007, and it has given me no SDM problems. It is my second fastest lens at f/2.8 - my SMC Takumar 55/1.8 is the fastest - and that makes it useful to me. I'm not much of a pixel seeker; I prefer just to have an image that I enjoy, and the 16-50 has given me quite a few images of that nature over the years. The Tak is just for fun.
My current LightRoom catalogue has these
keepers with the lenses I own(ed) (50-135 with SDM failure was replaced with the DA-L 55-300 which was in turn replaced with the DA 55-300 for Quick Shift). So, for me. the DA* 16-50 has given me the most keepers, even combining the 50-135 and the two 55-300's. (7,385 vs 6,141). The M 400 and DA 12-24 are for special purposes and run pretty close to neck and neck.
2,744 with the DA 12-24/4
4,036 with the DA 55-300 and DA-L 55-300
7,385 with the DA* 16-50/2.8
2,105 with the DA* 50-135/2.8
2,245 with the M 400/5.6