Hi I am eagerly awaiting delivery of the 45mm lens that was part of the deal when purchasing my new EM5. It doesn't take too long to start drooling over different lenses. I would like a longer lens and especially the 75mm 1.8, but that will have to wait for now. Something more affordable like the 135f/ 2.8 seems like an option, but I was wondering whether the 100mm would be worth considering. They seem to be pretty thin on the ground but look much more compact. Is there much to choose between the two apart from one being more compact but lacking a little bit of length?