The Fuji X10 has a nonstandard thread, it's not-exactly 40mm (which would be hard to find anyway). Here's my conversation on Twitter with the @fujiguys
are there any UV filters that will fit the X10?
"Using the Adapter Ring / Hood for the X10, you should be able to use any 52mm filter."
Is it possible to use filters directly without the adapter? I've read in forums that 40mm filters fit, is that true?
It's not exactly 40mm and finding filters that size is difficult. Buying the adapter ring helps further Innovation however :-)
I got the LH-X10 lens hood & filter adapter (it's one unit, in two parts) and a Hoya Pro1 Digital Protector 52mm filter (it's just a clear filter, not a UV filter).
Here's what it looks like all together
Here are the three individual pieces (the LH-X10 disassembled across the top, and the filter I bought on the bottom right)
Here's another option, with just the filter mount & Hoya filter on and the lens hood removed, and a 52mm lens cap over the filter. Notes: 1) Don't screw the lens hood on too tight, or you will have a heck of a time getting it off the filter ring. 2) The Fuji lens cap won't fit over the filter mount, so you have two options: a) if you use just the filter mount, you can get a 52mm cap with a cap keeper b) if you use the lens hood, you will need a cap that fits into a deep socket, which means no side-loop for cap keeper. I got a Matin 52mm cover with cap keeper, and a Nikon 52mm cap to use with the lens hood.
I got the filter in part to prevent fingerprints on the main X10 lens. The filter mount will also partially protect from dust, although it does have 3 vents around the sides, so it's not completely sealed. If you need to clean off your lens or filter, you can use a LensPen.
The LH-X10, 52mm filter, 52mm caps and LensPens are available from Amazon.com
In Canada, I got mine from my local Vistek.
November 5, 2011 Fuji X10 quick impressions