Cheap Eye-Cup Upgrade for 20D, great for those wearing glasses.
by adminNikon Rubber Eyecup for FG, EM, FM-10, FE-10, N2000, N2020, N4004, N5005, N6006 & N50 Cameras
Mfr# 2939 ? B&H# NIECN6006
Slips on the 20D, no need for any fancy attachments or plates. Its only $5.95 at B&H. I have been using mine for 6 months and have been loving it. Best Cheap Mod 
.Ivan
