There was a period, in the 1990s, when the only lens I really shot with was the Hasselblad, Zeiss 180mm f4.0. It was an exquisite lens and I felt, through most of the early digital years, that I would never discover a lens I liked as much, in the smaller format. And, for the most part I have been right. There are a lot of lenses that come close but few that I can honestly say "make the grade."
Then along comes an inexpensive, manual focus lens that seems to give me the same feel on my full frame, digital camera. It's the Rokinon 100mm f2.8 Macro lens.
I originally bought it to use with the A7Rii on an assignment to shoot tiny glass ampoules for a chemical testing laboratory. It worked incredibly well in that application and so I've continued to press it into any situations where outrageous resolution, coupled with a mellow attitude, is the preferred look.
The lens, available in most popular lens mounts, including the Sony E mount, is a gem. It's big and rock solid and uses one aspheric element and one high refraction element in a fairly complex design. As I mentioned, it is manual focus and has no electronic communication with whatever body it's riding upon. It has the classic, 9 bladed aperture for smooth bokeh.
There isn't much more to say about it other than it is a happy, mellow and well behaved lens with the potential for snappy contrast and very high resolution. I don't really care what system you put it on, I think it's a great lens at a very, very fair price. It makes me want to experiment with other Rokinon lenses....