Results 1 to 6 of 6

Thread: Is the built-in flash's power adjustable?

  1. #1

    Default Is the built-in flash's power adjustable?

    While shooting my toy car with flash on, using Macro mode with 350D, the shutter speed
    was F/4, ISO 400 and 1/60s. When I manually set F/4, ISO 400 in AV, the shutter speed
    was 1/15s. Does my 350D adjust the power of built in flash?


  2. #2
    Member
    Join Date
    Jun 2005
    Location
    Eastern Singapore
    Posts
    694

    Default Re: Is the built-in flash's power adjustable?

    Don't think so. I think the camera merely compensates for the apperture value IIRC.

  3. #3

    Default Re: Is the built-in flash's power adjustable?

    Maybe the flash only lasts 1/60s and the intensity of light when flash is on is 100s of times
    larger than my room light, so during the additional 3/60s in AV Mode, little light got into the
    camera.

  4. #4
    Senior Member
    Join Date
    Jan 2005
    Location
    Oulu, Finland, Finland
    Posts
    6,299

    Default Re: Is the built-in flash's power adjustable?

    shooting in P mode and Av mode gives diff shutter speed i realised. in P mode, it's 1/60.
    in Av mode, it depends on the sync speed setting.

    if i'm not wrong, there is an option to adjust flash power called FEC? my 10d does have FEC and noticable difference -1, 0 and +1 FEC.

    FEC is flash exposure compensation.

  5. #5
    Moderator catchlights's Avatar
    Join Date
    Sep 2004
    Location
    Punggol, Singapore
    Posts
    21,902

    Default Re: Is the built-in flash's power adjustable?

    Quote Originally Posted by dRebelXT
    Maybe the flash only lasts 1/60s and the intensity of light when flash is on is 100s of times
    larger than my room light, so during the additional 3/60s in AV Mode, little light got into the
    camera.
    Please read you camera manual for flash duration, if you set speed at 1s, or 1/60s (camera lens at same f-stop), the flash output will still be the same, what other factor the exposure when you shoot with flash on different shutter speed is the ambient light. if you need to adjust the flash output, you can use the flash compensation setting.

  6. #6
    Senior Member
    Join Date
    Feb 2003
    Location
    Outside the Dry Box.
    Posts
    16,268

    Default Re: Is the built-in flash's power adjustable?

    i think my KM D7D can...
    Logging Off. "You have 2,631 messages stored, of a total 400 allowed." don't PM me.

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •