do you ever use P mode?

I use something similar all the time for zone focusing in street photography on my Fuji. I set the aperture exclusively (usually to f8) and my ‘ideal’ shutter speed (usually around 1/500s) and let the camera select the ISO (within a determined range of my chosing; usually 200 -1600).

All of the shots will be f8. Where lighting conditions permit, all shots will also be at 1/500s with ISOs adjusted automatically to achieve an axceptable exposure. When there’s not enough light and the ISO is maxed out, the camera will only then drop the shutter speed to achieve a decent exposure.

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