Do you want your viewfinder looking like the picture above? This is what happens to my viewfinder on the X100T after nearly 2 years of normal usage. I don't think any of us wants to, except over time this WILL happen as somehow dust always finds is way into the X100 viewfinder. The X100F is not sealed, and there is no way to open the camera up yourself to clean out the viewfinder. Having owned all previous X100 versions, I have experienced this phenomenon happening to every single X100 I've had. Thankfully, there is an easy way to slow down the accumulation of dust over time (besides not using it).