. . . When I made the change to using film exclusively for Street, I used the film I had in my bulk loader at the time – Ilford FP4 Plus, an ISO 125 Fine Grain Film. However, with our typical British climate (cloudy) and my preference for Zone Focussing, I ran into problems with achieving a workable DOF.
With Street, most of the subject matter exhibits an annoying tendency to move unpredictably. Further, it has a nasty habit of not keeping a consistant distance from the lens from subject to subject.
Unable as I am to focus and adjust metering and aperture for each shot (the moment would be gone), I have to set the camera for between 250th – 500th and an aperture of around f/8 – f/11. This gives me a zone of approximately 15 -30ft (4.5 – 9m).
With FP4 Plus and the low light, I could only achieve between 60th – 125th, not enough to freeze the movement sufficiently, whilst maintaining a workable DOF.
Now with Ilford HP5 Plus (400 ISO), I can shoot at 250th – 500th (1000th on a really good day) and still keep the DOF, thereby seeing the shot, raising the camera and shooting in a second.