I am somewhat heavily invested...at least for me in Canon gear. I have 3 canon 600ex-rt flashes with the Speedlite Transmitter ST-E3-RT. The 24-70 2.8 mk II and the 70-200 2.8 IS mk II. Will or does anyone believe my flashes in addition to the transmitter will work with the a7R II. I have read that the TTL will not work which isnt really a problem. I believe this is what I will need for my lenses to work.
http://www.bhphotovideo.com/c/product/1054790-REG/metabones_mb_ef_e_bm4_canon_ef_lens_to.html
http://www.bhphotovideo.com/c/product/1054790-REG/metabones_mb_ef_e_bm4_canon_ef_lens_to.html