Fotasy Copper Adjustable M42 Lens to E Mount Adapter, 42mm Screw Mount to E Mount, Compatible with Sony a7 a7R a7s II III IV a9 a7c Alpha 1 a6600 a6500 a6400 a6300 a6100 a6000 a5100 a5000 a3500 ZV-E10

I'm using this with a Tamron 55-300 zoom lens on an A7RII. It's a big long lens, but connects solidly with the adapter and it feels like a single piece. Focuses fine at the macro, close and infinity ends.

Though this is just an adaptor without any electronics, it does fit well between my Sony cameras (A7iii and A7C) and canon L lenses that i own. You have to adjust focus manually, ideal for either fixed object video, or simple photo shoot where you have to achieve focus manually.

Did what I intended it to do, haven't actually used the lens much since buying this adapter but overall seems fairly solid.

Good

Excelente adaptador, se conecta firmemente tanto a la cámara como al lente, cuenta con un swich que al ser girado habilita la posibilidad de cambiar la apertura del diafragma de manera manual, el adaptador no tinen ningun elemento dentro por lo que la imagen pasa con claridad directo del lente a sensor.PRO:- Usal lentes viejos en camaras nuevas sin espejo.- Permite el control completo del lente conectado a la camara.- Hace justo lo que se anuncia.CON- No tiene soporte para tripie