Plz help

[Banky]

This might be stupid question. Can someone tell me what is exactly Push & pull to the film mean? What does it do? And lastly how to do it? what is the benefit of it? Thank you from beginner.

 

[Dan States]

It's just photo slang for shooting and processing a film at something different from it's rated speed.

Pushing means shooting a film at a faster rating (400asa shot at 800) and then extending developement times or using speed enhancing developers. You get marginally higher speed but with a loss of detail in the shadow areas.

Pulling means shooting at a lower sensitivity (50asa shot at 25) and SOMETIMES reducing the development time. This enhances shadow detail and can reduce the appearance of grain.

Best wishes
Dan