1 Reply Latest reply on Feb 8, 2015 6:54 PM by JJMack

    Bridge reports impossible Camera Data

    Doc_Pit Level 1

      I'm new to Bridge (CS6). There are certain instances when I am puzzled as to how Bridge handles the Camera Data it reports for each photo. I'm hoping someone can provide some insight. Example:

      I was running some fill-flash tests using a Nikon D3200, a Tamron 150mm-600mm f/5.0-6.3 zoom lens, a Tamron 2x teleconverter, and an ancient Vivitar 283 with a flash extender. (With the teleconverter, the Tamron f/5.0-6.3 becomes an f/10-13 lens.) An incident meter registered f161/3 at 1/500 for ambient light. For all test exposures, the lens was kept at 600mm, shutter priority at 1/200, evaluative (matrix) metering, ISO 400.

      When I examine the exposure information in Bridge, I notice that:

      • Some exposures show an f-stop between f/13 and f/14 at 1/200, and a focal length of 1200mm, which is what I expect. 
      • However, some exposures show an f-stop between f/2.5 and f/4.0 at 1/200 with a focal length of 10mm. Again, the lens was fixed at 1200mm (600mm x2 with teleconverter) and an aperture of f/13 wide open, so this exposure information appears to me to be impossible.

      Does anyone have any idea what is going on?