I have only got my manual RB67 and started using a handheld light meter. I have shot Velvia with an automatic electronic Nikon as an amateur for some time but I have never wrote down my settings in a lot of detail. When we spot meter it depends where we aimed it and how much adjustments we applied. Also there is reciprocity - going by Fuji they claim that 4" will require some form of adjustments and I read that some people have not needed to do that until XX seconds. So can anyone tell me what you guys do at night photography with Velvia 50? I would probably need to waste some film to bracket and really write detailed notes and do long exposures with and without correcting reciprocity. Depending how it turns out maybe I would need to use Velvia 100 which Fuji says does not need adjustments until 60 seconds. Thanks in advance.