I used Canon AE-1 and Canon A1 back when I was a staffer on Newsday Newspaper in New York. Used Nikon and Leica back then also. But my all-time favorite Canon SLR were my F1. So tough, it just always worked even under the worst conditions, like while covering the War in Nicaragua in the jungles and rainforest mountains.

Still have one working copy. I use it when I teach my 35mm B&W film course at a state university. Still have a few Canon SLR FD lenses too, but never had that Sigma one. I have owned modern FE-mount Sigma, and E-mount Sigma lenses.

I tried, but couldn't find much on that lens.

Cheers and best to you.

In the late 1980s I was selling Trade books to libraries. I stepped into a high school library to present the titles I was selling. I met with the principal, then with the head librarian. We talked a little before he offered me a tour of the library facility in the school. I knew there was something different with this library as compared to the other school libraries I went into. They had no hard cover books. All they had were magazine racks. I was informed that the school board decided to only buy magazines for the libraries. Their basis? The "kids" were only interested to finish their sophomore year in school. At which time most of the students reach their "age of maturity". They immediately drop out of school and go "out into the world" with the "blessing of their parents"! It was a high school in one of the Southern States.