After my experience with the Sigma Art 35, and their new dock, I'll wait until they release their Art 50 lens. If it's as good as their 35, I'll be all over it.
Cheaper IS implementations can be very cheap - just look at the £85 18-55 IS lens. I see no reason why another all-plastic replacement for the 50/1.8 line couldn't be released with IS for a similar introduction price - whether its f1.8 or f2.
I have a feeling the higher end f1.4 and f1.2 lens replacements are less likely to get IS, but it'd be nice to be proved wrong - those that don't want the feature can always leave it turned off, as long as they afford it.
No, because it will stay at home as I don't plan on dragging around a ~$800 dollar lens on holiday that weighs 200-400g more because of a system that I don't need. I have not needed IS to shoot with my current 50 1.4 ever, 24-70 Mk1/2 or any lens that "needs" IS. Like I said, A 50 STM f/2 with IS for the video and "I want IS" crowd would be great and I may even buy that next to a 50 f/1.4 II but IS on everything is just expensive and heavy~
EF 28mm f2.8 weights 185 gm, EF 28mm f2.8 USM IS weights 260 gm. This difference is only 75 gm. I do not know where did you get the 200-400 gm information. If you do not want to bring a $800 lens on a trip then would you bring a $1800 camera body on a trip???
What $1800 dollar camera body? I would bring an SL1 or some such on holiday. There is more glass in the 50 vs the 28. I would hazard a guess at 100-125g increase at tops for a 50 with IS not 200-400 like I stated, which is still too much. A ring type USM would also be welcome, rather then a micro motor.
