My oldest EF is a 35L, it can still produce beautiful images despite comparisons to the Sigma. A nine year old design can rarely outperform a new design but I'll keep mine anyway.
If memory serves me correctly, the very first EF I purchased was the 50-200/3.5-4.5L. And I also recall it was very hard to find at the time, perhaps on its way to being discontinued (?). Shortly thereafter I purchased the 100-300/5.6L. Too bad IS wasn't around for these two fine optics.
I still have my 100-300L AFD push-pull zoom. It's now paired with a new SL-1 body and makes an excellent hiking setup. It's AF is loud/buzzy and sort of slow, but the optics are still great and at 695 grams it's super light. I also have the newer 70-300L, but pound for pound, the ancient 100-300L can't be beat. And, it's black!
