This chart shows you the sharpest lenses you can buy for your Sony A1
The Sony A1 is still impossible to find in Stock in USA (BHphoto. Adorama. Amazon. Focuscamera.) and Europe (FotoErhardt DE. Calumet DE. Fotokoch DE. Park UK. WexUK.).
But if you already own the camera (or will get it soon) be sure to check out this easy graph that shows you the best lenses you can get for your A1 (Source: SonyAlphaBlog):
Join the Sony A1 Facebook group here.