Originally posted by pres589 The camera side of the database here on PF says that they default to 100 ISO. There is no manual ISO control
I had heard of people putting black tape over the DX coding on the cassette, may have been mentioned as advice in a photo magazine. Sounds like it would not work on the P-Series, but there must have been other cameras that offered DX reading, but also ISO selection if the cassette did not have the markings, and over-ride even if it did. In those days I loaded my own film into plastic cassettes sold for the purpose that obviously had no markings.
---------- Post added 09-11-20 at 03:45 ----------
Originally posted by khurtwilliams NOTE: I don’t intend on shooting at anything other than box speed.
The point is not to shoot at a different film speed for the sake of it, although some people do that and compensate later in the darkroom processing, for various reasons; it is called pulling or pushing the film speed.
The point here is to compensate for subject situations where the camera's exposure meter might get it wrong, bearing in mind that the meters in film days were not very sophisticated. The classic situation is a photo of someone against a very bright background, when they would end up as a silhouette because the camera reduces the exposure to get the background correct and therefore under-exposes the person.