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Thread: Is there something wrong with my flash?

  1. #1
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    Exclamation Is there something wrong with my flash?

    I am using canon 10d with 550ex. all bought secondhand.

    The problems are
    1. Is it normal when i take a photo in a very low light room, i can see the preflash before the shutter opens. but the resulting photo is dark.
    2. I took a photo using my build in flash in a mirror, i can see the flash in photo, but when i use 550ex, i cannot see the flash in the mirror.

    Is it normal that external flash behaves like that? or is my flash out of sync with my camera?

  2. #2
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    Default Re: Is there something wrong with my flash?

    Seems like your flash is out of sync or something. It is normal when shooting in E-TTL mode to have a preflash - that preflash is used to judge flash exposure. However, when the resulting photo is still dark, something must be wrong here.

    Might I ask if in example 2, you were shooting with the 550EX pointed straight ahead (ie. direct flash)?

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    Default Re: Is there something wrong with my flash?

    ya direct flash. mmm... so i should see the flash in the mirror?

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    Default Re: Is there something wrong with my flash?

    if it si really out of sync, where can i service it? how much?

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    Member lennyl's Avatar
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    Default Re: Is there something wrong with my flash?

    It sounds like a faulty flash, but can you check a couple of things first?

    1. Are there any settings on the flash (including custom settings) or is it all set to default?

    2. Is high speed sync on? If so, does setting it off make any difference?

    What are the settings on the camera when you took the test shots?

  6. #6
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    Default Re: Is there something wrong with my flash?

    You should see the flash if you are firing direct into the mirror. The flash should fire when the shutter is open, if not it won't be illuminating the scene you are photographing. This means you should see a reflection.

    Try what lenny says - reset your flash's custom functions, switch off high-speed and 2nd curtain sync (although neither of these should affect your flash, because either way, it should fire during exposure time).

    The safest place to send it for repair is at Canon Service Center. There are other people who may be able to do it, but it's at your own risk.

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    Default Re: Is there something wrong with my flash?

    sorry guys, i went overseas. i went back to p&g today and the shopkeeper david told me nothing is wrong with my flash.
    These are the photos i took again against the mirror.
    1. without flash. EOS10D, ISO400, f4, 1/2, 24mm, aperture priority

    2. with flash. EOS10D, 550EX, ISO400, f4, 1/3, 24mm, aperture priority


    I still could not see the flash in the mirror as u all stated. Please help.

  8. #8
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    Default Re: Is there something wrong with my flash?

    that's awfully weird... if flash not seen during the exposure, that means no light from the flash is actually recorded wat...
    Pentax K100D Super

  9. #9
    Moderator Octarine's Avatar
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    Default Re: Is there something wrong with my flash?

    Try checking with a different flash unit and a different camera if possible. So you can eliminate if it's a problem of the camera or the flash unit.
    Nice to see how the white balance gets changed the moment you activate the flash

  10. #10

    Default Re: Is there something wrong with my flash?

    Clean all contacts, and check your custom functions. Make sure the part where it says something about 'external flash emits/fires' is 'ON'. If it's not, ANY external hotshoe mounted flash will NOT fire.

  11. #11
    Member lennyl's Avatar
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    Default Re: Is there something wrong with my flash?

    I thought I recalled reading something similar in dpreview. Did a search and found this thread. See if this post helps you:

    http://forums.dpreview.com/forums/re...5&changemode=1

    Good luck, and if could let me know when this is fixed I'd appreciate knowing how (for future reference). Thanks.

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    Default Re: Is there something wrong with my flash?

    Thanks guys for all the advice! i tried all to no effect. So i lent it to my friend, he tested it with his 10D, 20D, 1Ds and 1DMII all shows that it flash too early and when the shutter opens, the flash is already gone. I will go back to the shop and ask for a replacement. wish me good luck since i bought a spoil flash, not sure if he would change it for me.

  13. #13
    Member lennyl's Avatar
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    Default Re: Is there something wrong with my flash?

    Quote Originally Posted by 200sx View Post
    Thanks guys for all the advice! i tried all to no effect. So i lent it to my friend, he tested it with his 10D, 20D, 1Ds and 1DMII all shows that it flash too early and when the shutter opens, the flash is already gone. I will go back to the shop and ask for a replacement. wish me good luck since i bought a spoil flash, not sure if he would change it for me.
    Yeah, odds are way, way in favor of a bad flash.

    BTW what does your friend do? Collects Canon DSLRs?

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    Default Re: Is there something wrong with my flash?

    My friend is a safra photographer. i traded in and bought a 430EX. now playing around with my flash! sweet

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