I'd take the A2RII sensor size over the A6's speed anyday.
Here are some adaptors for lenses. https://fotodioxpro.com/collections/lens-mount-adapters
A good place to go to see lens rankings: http://www.photodo.com/browse-lenses/sort-mtf-score-desc/p-1
Notice as you go down the list that zoom lenses don't start showing up until the third page!!!!!!!! Get the A2RII with the big sensor, use lens adaptors, and get fixed focal length lenses (used if you can find them) for the best quality photographs you can make with a 35mm size camera!

Last edited by 22WRF; 05/21/17.