[ausphoto]

Thanks for the comment. indeed, a possible option..
But I'm shooting with a Widelux, which is limited to 1/15, 1/125 and 1/250. For the DoF (the Widelux is fixed focus at 15 feet) I need f8 or preferably f11...yes...@ 1/250 I can just get to f8 with ISO100 and and a 2-stop ND (which is the Widelux filter).
But a few shots will be at the beach in really bright light and I'd prefer to be able to have some leeway. so that I can bracket a shot at f11 with the 2-stop ND...and then I need ISO25 (or ISO50)...and no, there are no 4-stop ND for Widelux


as to in-date. I'll cope with recently expired as well as I'll do a b&W conversion...but I can't do a B&W development in the field, not for essentially three images I am after