Why does my camera do this for aperture?

Discussion in 'Photography Beginners' Forum' started by a1157814a, Dec 22, 2008.

  1. a1157814a

    a1157814a TPF Noob!

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    When I set my camera to 'aperture priory', where I can adjust the aperture. For some reason, when I have the FLASH ON and change the aperture, the shutter speed remains the same. However, when I have the FLASH OFF and change the aperture, the shutter speed changes as well according to how much I change my aperture. Why dose it do that?

    2nd question:
    What can I do to focus on the close object? (besides setting aperture to f/4.8 which is the most that my camera allows)
     
  2. reg

    reg TPF Noob!

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    1) the flash sync speed.

    2) The minimum focusing distance is the minimum focusing distance and there's really not much you can do beyond that.
     
  3. a1157814a

    a1157814a TPF Noob!

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    I just noticed that my camera had it gone as far as f/4... but it only does that sometimes? I guess depends on what I had on other settings? Why is that?
     
  4. ANDS!

    ANDS! No longer a newbie, moving up!

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    Get a lens that allows you to focus closer. How close are you trying to get? AP wont really affect this (other than giving you a shallow DOF to work with).

    The first answer yo your question is correct. You have your camera set to a 1/60 sync speed. To achieve a faster speed you will have to go into your cameras menu, and change the sync speed to something faster. Be aware, that you can also choose a SLOWER shutter speed when using flash, but you wont be able to choose anything faster unless you use your cameras high-sync flash mode (which allow shutter speeds up to the fastest shutter speed your camera is capable of).
     
  5. Turnerea

    Turnerea TPF Noob!

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    I'm guessing you're using a zoom lens- often zoom lenses will have a variable maximum aperture, at the long end it isn't able to open up as much as it can at the wide end. For example is Canon 100-300mm f/4.5-5.6. There are two fstops listed as max apertures... the first corresponds to the max when at 100mm, while the 5.6 refers to the 300mm end.
     

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