f6cvalkyrie
Well-known member
Hi !
I've been searching the web on this focusing problem when changing FL.
It seems that manufacturers and photographers are using the word "zoom" in a wrong context :wtf:
Real "zoomlenses" are common in TV and cinema, where one zooms in to max FL in order to have the easiest and most precise focusing on the right position. And then, they zoom out to the wanted composition.
TV and cinema operators do also need sharp images throughout while recording and zooming.
So, real zoomlenses should remain in focus while changing FL !
Other users, like us photographers, do not necessarily need an image that remains in focus while changing focal length. We can first determine the composition and then focus. Lenses that do change focus while changing FL should ideally be called "variable focal length lenses" to differentiate them from the real "zooms"
Peter, I suppose your zoom from Angenieux comes from a movie camera ?
C U
Rafael
I've been searching the web on this focusing problem when changing FL.
It seems that manufacturers and photographers are using the word "zoom" in a wrong context :wtf:
Real "zoomlenses" are common in TV and cinema, where one zooms in to max FL in order to have the easiest and most precise focusing on the right position. And then, they zoom out to the wanted composition.
TV and cinema operators do also need sharp images throughout while recording and zooming.
So, real zoomlenses should remain in focus while changing FL !
Other users, like us photographers, do not necessarily need an image that remains in focus while changing focal length. We can first determine the composition and then focus. Lenses that do change focus while changing FL should ideally be called "variable focal length lenses" to differentiate them from the real "zooms"
Peter, I suppose your zoom from Angenieux comes from a movie camera ?
C U
Rafael