When I bought the Sony A7, I looked forward to using my Voigtlander 35mm f/1.4 and 50mm f/1.1 with the Metabones Leica M to E mount adapter. I have been quite disappointed though, there is visible vignetting with the 50mm and on the 35mm it is very obvious and distracting. So I bought the Lens Comp app but have been even more disappointed because: a) I can't zoom-focus when using the app. b) I've just realised that I can't take raw photos when using the app. It switches to L fine JPGs. This makes the app practically useless to me. c) The app compensates for vignetting adequately on the 50mm (barely) but it doesn't compensate enough on the 35mm. Somebody please let me know if I'm missing something or doing it all wrong, or something.