The third iteration of the lens, but basically the same lens as the previous, with 170° on the diagonal of the frame, and the new AI aperture coupling.
It was introduced in 1977, AI serial numbers start from sn.280001
Please note the lens cap is always all-metal, slip-on, 64mm marked 64k
- On MIR website you will find all the historical information you need on this lens.
- A nice review by KenRockwell from an expert photographer perspective, even if not from a panoramic photographer he has a valuable approach in evaluating lenses. The lens he has is the 1st version, F mount, factory modified in AI