>>3324683The Sony 35mm f1.8 is much more compact and a better option for the streets than the Sigma 30mm despite not being quite as sharp as the Sigma. Plus the OSS goes a LONG way if you're shooting while on the move or filming any video unless you're on the A6500 with IBIS.
I'd say the best go to lens for street photography would be the Sony 20mm f2.8 pancake. It's not the sharpest but it makes the camera ultra compact and non-threatening while giving you a consistent wide angle to play with. It's fairly affordable on the used market these days too.
http://www.keenanrivals.com/journal//first-impression-of-the-sony-e-20-f28Also if you use a Canon EF to E-Mount adapter, the Canon 24mm f2.8 pancake is really good on the A6*** series, though AF can be spotty depending on the adapter you get.