Originally posted by BigMackCam I have an A7 Mark II that I use primarily for old, adapted Russian M39, M42 and K-mount and Nikon lenses. It's perfect for that purpose, and the built in "SteadyShot" stabilisation makes a big difference. I'd recommend it on that basis. The original A7 is decent too (though missing SteadyShot), and would be my next recommendation if the the A7II is out of budget. Cropping to APS-C gets you 10 mega-pixel images on either of those, which is enough for most purposes, and means you have the option of full frame or APS-C for your lenses. The A6xxx series are also very good, but APS-C only, of course.
I still use M42 and K-mount manual lenses on my K-3, but not often since getting the Sony. The focus-peaking and magnification in the A7II's viewfinder makes manual focusing so much easier. Live View works well enough on the K-3, but I don't find it as convenient. However, quite a few members here get great results using a Hoodman LCD loupe (or similar). I'm considering getting hold of one, as I'd love to make better use of adapted lenses on my Pentax gear...
+1 Mike. I have the A7, had the A7 II, have the a6000, and have an NEX-3. They all are a blast to use, for ME. For me, the larger range of available lenses make it worthwhile. I adapt Canon FD,
Minolta, Konica, and Olympus lenses. With the proper adapters, I can use these lenses on all the Sony e-mount bodies, and on my Panasonic GH-2. The number of body / lens combinations
keeps it interesting from day-to-day. My mint Sony a7 with less than 1000 clicks, for less than $700, was a bargain, IMO. In summary, I find the Sony e-mount bodies to be a great companion to my Pentax K-1.