My X100F with lens hood is great for (very) little extra space. I use the type of hood that doesn't stretch, but I think another option would work as well. I don't use the thumb attachment, but it looks like it works too. Velcro. I have used a different brand of neoprene snap on case but I seem to have lost it. This is a more comfortable option for the camera. This case has a loop and biner (which I wouldn't trust on this $1,300 camera), and the other has a tether, which is handy for keeping the case from dangling when it's not on the camera located. I cannot be happier with this purchase.
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