Yes, but that amount of air is going to contain a rather insignificant amount of radon atoms. And as I said, even alpha particles emitted inside the camera have little hope of actually making it to the sensor, which is sandwiched between several layers of filters and the backside electronics and the camera chassis. (4He nuclei from space, making up around 10% of cosmic rays, on the other hand can have enough energy to penetrate the atmosphere and up to tens of meters of solid matter, so you might certainly capture some of those, besides the muons.)