I'd think the best way to use this is to work with the EVF and not the OVF for a clear view. I don't know if the official X100/100s lens hood, or any other third party hoods for that matter, would work with it but the advantage of getting a 50 mm is worth persevering with. I know others have said they are happy to step back or forward to get the image but there are times when you can't do that. Think of travelling by rail or near traffic, the extender will save the day without needing to crop. For those of us who have bought the X100/100s and are not natural 35 mm users, the fact that this will give us a nice leaf shutter camera but with a 50 mm is brilliant.