Well no, I'm not a pro. I do have an photo AAS degree from Philly Community. Unfortunately, I went as an "old man", but at the very end of the film era. They did forgive me for having a somewhat idiosyncratic approach to a couple of courses. Portraiture was one. I couldn't for the life of me figure out why I should shoot head shots of 20 year olds with a Hassy, while having to stick on a soft focus filter, when I could just bang them out with my 80-200 f2.8, print them to the required 11" x 14", and they looked just dandy, no filter required.
Then there's entry level pro, the infamous wedding photos. That's a hard pass. My kid (40+) was in his 1st wedding and 2nd childhood. He didn't hire me, (thank god). The missus had to have a pro.. OK, so I banged out what they admitted was the best shot of them getting out of the car at the church.. Then took my leave after the ceremony. Well, "the pro" managed to have all the of photos from the reception focused on the back wall, but no one in the room. The whole concept of weddings raises my hackles anyway.
Then I was in PCC's color lab, (after graduation), and this young lady student was printing wedding photos she had taken. Printing up a storm she was. I couldn't keep up. Then when she got them into the light, I couldn't help but notice they were at least .40 too cyan. Oh well, hopefully her customers didn't notice. Those were the "good old days", 1/2 degree temperature control and seemingly endless test prints.
I'd like to do nude art work, but I'm not in the Ukrainian or Russia mobs, so that's out. There's no oligarch's den to borrow for a shoot where I come from. Not to mention no women with a BMI under about 30%.... or so.
Getting back to on off topic, I've always shot with two bodies My "normal lens" (80 - 200 2.8), and either my 18 -70, (now 16 -80), or some trick nonsense, 8 mm FF fisheye, 10-20 or 8 -16 Sigmas. I bought the D-5200 for the 24 meg sensor, fold out screen, 46 pt autofocus, specifically for the 8 mm. Sure, it's all 10 YO junk, but as is said, "it's new to me".
I can easily understand why today's crop of photogs, don't have my "grab a couple of bags and go" approach. The prices of that mirrorless stuff, even the low end, is absurd. But then again, even my now archaic D-90 was a grand new.
I did manage to finally get off my a** and catch up with the Budweiser Clydesdales in Margate NJ. This after not being willing to pay the outrageous admission at the Devon Horse Show, and fed a Google map that was marked five miles off from the beer distributor where they actually were.
Oh well, enough of my whimpering and reminiscing, Cheers.
This should provide you with a good laugh about "used lenses":