DE-1 maintenance
		There are foams inside the DE-1, and like the external foams of the F2 body, they have deteriorated and turned sticky. The old foams would eventually corrode the coating on the prism making it unusable, see photos below. Since there are no more spare parts, the old foams should be changed before marks show up on the viewfinder.
		Gray/black patches showing areas where the old foam had corroded the silver coating			Gray/black patches showing areas where the old foam had corroded the silver coating