The Leica M 50/1.4 is still around 300g and a great lens. But indeed, as the sensor resolution of 35mm cameras exceeds many classic medium format cameras, the

The Leica M 50/1.4 is still around 300g and a great lens. But indeed, as the sensor resolution of 35mm cameras exceeds many classic medium format cameras, the best lenses have grown accordingly to serve that resolution. To me, the Leica M system stayed mostly true to the 35mm cameras of the film age. The other alternative in my eyes is mFT which offers great "digital" lenses in the size of small classic 35mm lenses.