Originally posted by jimr-pdx: Curiously enough my 'standard zoom' is the xiaoYi 12-40 f/3.5-5.6
In my tests with several others it performed comparably and I liked its range. What really sold me was that Oly/Lumix bodies (apparently) do not autocorrect off-brand lenses for distortions - but this lens matches up with the corrected shots!
The more I look into this topic, the more my head aches
YI states that their M1 does corrections, so I presume that it corrects other brands too? Since TruePic VII (EM1/10) Oly bodies claim to perform the magic with Lumix lenses.. so perhaps the YI 12-40 is corrected in my EM10. But how about Sigma lenses, those reverse-engineering mount specialists: do they conform to the cameras' expectations?
The more I read, the more I see we're all in the same boat. Nearly every post comes from someone who believes they understand it all, but each has a slightly different subtlety that suggests we're not all saying the same thing. I wish these things had an "all corrections off" that I could be certain would do exactly that.
I'm not going to waste a bunch of time testing for variations though, life's too short for that. If someone has a definitive statement on this, I'd like to spend 15 more minutes on the topic and be done!