Quote Originally Posted by AgX View Post
So, there are cameras where you you have to engage that stop-down button time again?
I prematurely thought they all could be arrested for repeated exposing.
A lot of SLRs have a spring loaded stop down button which has to be depressed. Generally speaking, older mechanical models and professional SLRs had a lever that could be engaged, as had some late cameras on the body. Stop down mode began to be seen as a luxury as camera technology developed, even as a push button facility. I can't recall whether the OP's F3 and FM can be locked into stop down. If they can, I'd advise experimenting with it for street shooting.

Strongly coloured filters can provide a similar job of 'unifying' the field of view, but that means shooting B&W.