Hi, sorry for the newbie question but I have just ordered an A7r after downscaling my equipment from an A99 and 70-400mm behemoth. Now what I am looking for is a 100-300mm lens, which I realise they sadly dont make in an e-mount, but obviously they are available in other mounts/manufacturers. So my question is, given that I want autofocus (doesnt need to be super quick, I have an A6000 for that), what would people recommend? My quandary is that whilst I know there are a lot of adapters on the market, most that have the electrical connections are at least £70 upwards, so I dont want to say buy three for each make. I would rather just buy one and stick to that manufacturer. One last quick question, if the adapters do have autofocus, etc. does that mean that if the lens had it, the optical stabilisation would work?