Comment by ksk

Oh, of course. I agree with you that it is not useless and I myself rely on it quite frequently. I guess I should have made my point clear. The relevant point of the blog post is that IS is not very effective at high resolution. I don't know if you've shot with a 5DSR or any other 50+ MP camera It is very tricky to get a super sharp image since the tiniest bit of movement gets picked up. I can only imagine it gets worse at 120MP..