Dust in Bessa RF spot

[gbb]

A piece of dust just appeared out of the blue on my Bessa R's rf spot, when focused near. Is there anything I can easily do to fix this? Thanks.

 

[troym]

Same thing has happened to me (and others). I've decided to leave well enough alone to avoid messing up the rangefinder. There's an earlier thread on the topic a little further down the list.