Nicely fit. I bought it to use with the "Metal Adapter Ring + Lens Hood for Fujifilm Fuji X10 replace LH-X10". It's bigger than X10 lens size then easier to handle with my fingers (I love that Because I am not good at handling tiny thing!) And goes tight with the hood. I do not have to keep the original X10 cap while taking photo any more. Cheap and good! Highly recommended!