In general terms (film days) 35mm was considered the must have 'street lens'.
Lots of people say 'street' - are you wanting candid, from the hip, architecture, portraits etc.
Have you got the balls to approach people for portraits? If so a 50mm is very handy.
If you want a 'from the hip' style of shooting a 35mm @ f8 will get everything sharp once your hyper focal distance is dialled in.
No one lens is perfect of every situation.
A consideration - it's easier to crop PP than to get home and not have the whole scene because your lens wasn't wide enough.
Something people don't always understand is the centre of every image with any given lens has exactly the same perspective when viewed from the same position.......meaning you shoot a scene on a 50mm and on a 35mm the centre portion of that image when cropped equally will ALWAYS be the same.
If your camera is hi enough quality you won't see any change, only around the edges of your field of view.
Some lens do compress more but with 35mm/50mm the difference is so minimal.
On a crop sensor you want to try 20/24mm on full frame 35mm.
Always buy the best quality lens you can afford.
I am shooting a 50mm f1.2 lens from 1979 - love it. ( on a D3)
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