Canon EF 100mm f2.8 USM Macro cover These are auto-diaphragm tubes with

These are auto-diaphragm tubes with a stop-down passthrough system

a good rangefinder (inasmuch as a Fed rangefinder can be described as "good") and accurate shutter speeds

styled like a classic Leica Elmar (but it’s not an Elmar

Both mount faces lock securely and helicoid action is smooth

Canon EF 100mm f2.8 USM Macro cover These are auto-diaphragm tubes withThe Canon 100mm f2. 8 USM Macro is a good quality macro lens that provides magnification up to 1: 1 without the use of extension tubes. It's also an excellent short telephoto lens in general, making it a good choice for portraits or other slightly far away subjects. In very good condition, with some cosmetic wear (including a lightly etched focus scale window) and some internal dust.