View Single Post

Old 04-13-2015   #5
Likes Leicas
Rob-F's Avatar
Rob-F is offline
Join Date: Mar 2007
Location: The Show Me state
Age: 79
Posts: 6,313
I have to take cosine error into account when photographing paintings in museums. Especially with impressionist paintings, there isn't anything detailed enough in the painting to focus on! So I focus on the edge where the frame meets the canvas. If I panned to there, I would get cosine error. Instead, I side-step to the left, focus, and side-step back to center, always keeping the lens axis at 90 degrees to the painting. Seems to work well, at least for small paintings.
May the light be with you.
  Reply With Quote