LOL.. well I have jars of pot... still trying to get the health back though. You definitely have a lot more slr experience than me. I'm still a newbe.... only been messing with them for a few months. The extension tubes do work great with the 90mm tamron though. Even when using all 3 tubes(68mm) the end of the lens focuses for max magnification 6" away from the subject so light isn't a big issue. When I tried them with a 40mm macro I had to get too close to focus.
I turn 50 in 6 months. I work 7 days a week 8-14 hours a day. It's more like a marriage with my work partner then work. Love doing it. Restarting a delivery service before Xmas. Love California but hate most of the people. I sell everything from cutting off my plant to clone yourself, clones, preteens, teens, minimoms, moms, giant moms, bud and shatter....
Strains currently running are Tangerine Dream, Amsterdam Chronic aka Supernova, Chernobyl, Banana Kush, Jilly Bean, King Tutt, Sunset Sherbet, Strawberry Cough and UK Kush. Starting seeds next month of Purp Dog, Bubble Diesel, Jilly Kush, Mazar Sherife, and a few others.... I lollipop and defoliate most plants. I grow 9 five gallon pots under one light. We also pull over 2.5 lb per light. So I have lots to take pics of. Lol.