[Rainer]

There is one thing with old 5D's you should have an eye on:



Very early models of the 5D (Serial numbers 043020xxxx) have a

weakness in the coating of the AA-filter. Certain cleaning fluids

will disolve the coating and irrecoverably damage the AA-filter.

Sone fluids seem to be ok ... others not.



Since I own a 5D of this series, I do only dry cleaning with a rocketblower

(works most of the times pretty well) and brushes (for the stuff I cannot

blow away).



I usually check at f/8 and at f/22 ... if I don't see any dirt at f/8 (but see something

at f/22) I dont clean ... if I see the dirt also at f/8, I will clean.



Rainer