apochromatic telephoto

The 90/3.5 Apo Lanthar doesn't actually contain any Lanthanum of course; it's not allowed any more.
But with the help of its LD element, it does deliver optically; truly apochromatic at all three wavelengths. As the longest length in the range, we are banging up against SLR territory here but if you must…the 90mm is a great compact long lens, with 27° diagonal angle of view
Lens mount: L Screw
Lens construction: 6 elements (1 Low Dispersion) in 5 groups
Minimum Focus: 1.0m
Minimum Aperture: f16
Weight: 260g
Hood: Built in
Filter Size: 39mm