Photographic term Reciprocity failure SWPPJoin The Fastest Growing Worldwide Association for Serious Photographers

SWPP Home
Magazine
About us
Join

Term - Reciprocity failure


Reciprocity failureSWPP Photographic Glossary

Sunday 21st October 2018  




SWPP

Glossary
 

Read all about it...
Stop Press...
Members in the News!

The Societies' Photographer
of the Year 2017
Results Announced!

Image Competition
Free entry for SWPP members.

Membership
Free Information Pack

Qualifications - An Overview

Reciprocity failure

Reciprocity law states that as you increase the intensity of light reaching the film you also need to decrease the speed it reaches the film by the equivalent amount. Most films work quite happily between exposures of 1/2sec and 1/1000sec, but go beyond these extremes with a very low intensity of light and a long exposure or a very high intensity of light and a correspondingly short exposure and the law fails an exposure increase may be required when the shutter speed is beyond these limits. At these extremes the law fails. Compensation is required to adjust for this, but there is no strict rule to correct the error.



 

Information provided by: SWPP
More Photographic Terms

SWPP, 6 Bath St, Rhyl, LL18 3EB
Tel  01745 356935
International code (44)
Copyright 2006-16 SWPP. All rights reserved.
10/02/2017 10:29:05