Thank you all for the warm welcome! It means a lot.
I started off with a Kalimar (Pentax K-1000 knockoff) that had two K-mount lenses. I went from that to a Pentax K-100D Super, then the K-3, and now the K-1 II. I got a Sigma 70-200 F2.8 used at a great price for the K-1 for horse photography. I was excited until I learned about the mount compatibility issue that this lens has with the K-1 body. It works on the K-3 just fine, but not putting it back on the K-1. Supposedly Sigma will fix the lens, but I have to send it in. Unclear if they will fix it since I bought it used.
I had never heard about Irix lenses, so that will be fun reading. I have one Rokinon 35mm that I bought based off of recommendations from the lens reviews here. Wow. What a great lens.
I have 4 older Super Takumar lenses that I got from the local camera shop. They are fun to play with as well, but harder because I have to set everything manually. I need to learn more.