sn 100100 to 1072xx and 1092xx to 110150 are single coated; 1102xx to 1119xx are MC, and the 1074xx to 1091xx range contains a mix of single and multicoated lenses. Front ring reading is \"ZUIKO Shift 1:2,8 f=35mm sn\" for single coating; \"ZUIKO SHIFT 35mm 1:2.8 sn\" for multicoating. There are no shift lenses marked \"ZUIKO MC\". Multicoating for this lens was introduced between 09/1984 and 01/1985, i.e., it was the very last of the OM-System lenses which were upgraded to multicoating. Thus indeed only 15 to 25% of the 35mm shift lenses are multicoated. It might be that the sn 1074xx to 1091xx range was duplicated with two lenses having identical serial numbers: one SC, the other MC.
Dec 09, 2008 at 02:08 PM
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