Jwenting From Netherlands, joined Apr 2001, 10213 posts, RR: 19
Reply 1, posted (13 years 11 hours ago) and read 1623 times:
Your camera allows you to choose to change the filmspeed if you want, or to use film without DX coding.
Changing the speed will tell the meter to expose for a different rating. You will then have to have that film processed specially to use that rating (and not in the automated machines which also use the DX coding).
Da fwog From United Kingdom, joined Aug 1999, 867 posts, RR: 8
Reply 3, posted (13 years 5 hours ago) and read 1607 times:
Nope - you need to take the whole roll on one setting.
Basically, unless it's a dire emergency, don't expose ANY roll of film at anything other than its rated setting. And as virtually any roll of film you buy these days should already be DX coded, it's unlikely you will ever need to resort to specifying the speed manually.
Cfalk From , joined Dec 1969, posts, RR:
Reply 4, posted (12 years 12 months 4 days 22 hours ago) and read 1598 times:
The whole film MUST be shot at the same ISO rating. Preferably, you will know even before you put the film in the camera that you will "push" it, so that you use a marker on the film canester, mark it +1 or +2, put the film in, adjust the ISO and shoot the whole film like that. Marking the canister will make sure that you don't forget to tell the lab to push-process.