Former casual/hobbyist here. Had a Nikon FM2 in the 80's - 90's, got an Oly E-1 when they first came out. Got an E-P3 in 2012, and just got a new E-PL9. When I had the E-1, I used the 14-54 f/2.8 & 50-200 f/2.8 lenses, glad to say that they work fine on the '9 with the micro adapter. I never learned my prior cameras very deeply, but this time I am learning more via the owner's manual, u-tube, and by lurking around here. My brother is a pro real estate photographer in MI, and has been feeding me tips too. Sure is FUN, and I hope to up my skills in 2019 a lot.