View Single Post
  #12  
Old 15th January 2021, 10:43 PM
billcowan's Avatar
billcowan billcowan is offline
Friend
 
Join Date: Mar 2011
Posts: 82
Default

Assuming we are talking about Black and White here, Cyan is the same as a minus red filter. Black and White paper is sensitive to Blue and Green light. Red is of course the safe light and using Cyan to block Red light just makes for the equivalent of a dimmer safe light with no effect on paper exposure.
On the other hand filters are not perfect and there may be minor changes to the small degree that the Cyan filter might actually change Yellow or Magenta light.
So yes the use of Cyan makes the visualized image dimmer but with no changes in exposure or contrast.
__________________
www.eleventyoneportraits.com
Reply With Quote