> 400mm focus length option for A7r
For 400mm i'm guessing wildlife and maybe birds. If you're depending on af, I'd go with sony/minolta and la ea4. Metabones 3 takes too long to focus for wildlife. One way is to use high shutter speed to make up for the lack of ibis. The other option is sigma for sony mount. Sigma 120-400 has os on lens for sony mount. So does their 70-200.