Search:

Type: Posts; User: JaredSMark

Search: Search took 0.00 seconds.
  1. Replies
    8
    Views
    17,830

    I forgot about this whole thing. Mitch said...

    I forgot about this whole thing.

    Mitch said that the entrance pupil changes when you zoom and my lens does appear to do that, so that's one thing. The other thing is that the focal length is...
  2. Replies
    8
    Views
    17,830

    I thought the F-Stop number was a relationship...

    I thought the F-Stop number was a relationship between the entrance pupil and the focal length?

    It's looking like the there actually IS a change of light when zooming in, since that's kind of what...
  3. Replies
    8
    Views
    17,830

    Variable Aperture zooms. How do they work?

    As far as I understand it, when you zoom in the F-number changes because the entrance pupil's apparent size is changing due to how some of the glass on the inside of the lens is magnifying it. Since...
Results 1 to 3 of 3