I am a beginner in photography. I saw some wildlife photography technique books. There are descriptions about the settings that the photographer used when they took below each photo such as the aperture and shutter speed used. What I found most common in taking bird photos is that they often mention something like "Fuji Velvia pushed one stop to 100". I know that ISO of Fuji Velvia is 50. What does that "push one stop to 100" means? What is the use of it? How can I achieve it by changing my camera settings? Thanks a lot!
#1. "RE: Push one stop" | In response to Reply # 0BJNicholls Charter MemberTue 20-Feb-01 04:41 AM
"Pushing" means that you set your camera ISO as if the film had a faster rating. There is a one stop difference between Velvia 50 and the manually set ISO of 100 so you have an extra stop to work with for aperture/shutter speed. When you decide to push a roll, you must shoot the whole roll at the higher ISO speed and then tell your lab that you need the film push-processed. Push processing runs your film through a longer development time to make up for the 1-stop underexposure you gave the roll of film.