Canon Macro Lens FD 50mm f3.5  type_Projectors so I can not tell

so I can not tell you why this seemed like THE THING to do back in the olden times

switchable close-up lens that gets you down to 3 feet

with about the same height

but no autofocus capability

Canon Macro Lens FD 50mm f3.5 &nbsptype_Projectors so I can not tellThe Canon Macro Lens FD 50mm f3. 5 is a compact macro lens that provides up to 1: 2 magnification without the use of extension tubes. It's a touch longer (and slower) than a typical 50mm standard lens, but it's a perfectly nice everyday lens, even if you only use the macro capabilities every once in a while. In excellent condition, with light cosmetic wear, minor internal dust.