Tim - It should be understood that over/under exposure refers to the highlight of a scene , not the shadow, as I'm sure you know. If you are using an averageing meter and an ISO of 200 with a 400 ISO film, then you are (on average) overexposing the film by one stop with each exposure, creating a highlight of greater density than necessary. Pulling back on development will assist in producing a more "normal" negative.(posted 9673 days ago)