OK, here we are with GAS time again! I'm trying to keep the kit small(ish) and light(ish), but I'm looking for something longer than the 35-100. It's a once in a while thing rather than an every day lens. I've been looking for reviews of the 100-300 mkII but can't seem to find them. Lots of the mk1 available of course, including YouTube. Also, I've been looking at the 100-400 image on this forum and TBH I've not been over impressed with the shots at 300-400 (they seem soft) but maybe I'm missing something? So, anyone used both the mkII and the 100-400? How would you compare them? The 100-300 is obviously much cheaper, is the 100-400 really worth it? FWIW I'll be using this on the GH5.