In article , Bill W wrote:

When I buy a new camera body, the previous one ends up in a closet.
It crossed my mind to put a walkaround lens on an earlier body, and
throw it in the trunk of my car, so I always have a decent camera
with me - one that is good in low light. But it gets hot around
here, and the car could end up sitting in the sun in 110 degree
heat. Does anyone know if this can cause a problem? I'm mainly
talking about the possible volatilization of materials inside the
camera or lens that could end up leaving a film on the sensor, or on
the inside of the lens. Anyone have any idea if there is a risk of
that?

I don't think there's a risk of any other heat damage.

The temperature of the trunk is not as high as in the car, since the sun doesn't
shine there. It's still hot of course, but I don't think there would be any
problem.

--
Sandman