Mini Flash Sensitivity

Discussion in 'Photography Beginners' Forum' started by Derek Zoolander, Feb 5, 2009.

  1. Derek Zoolander

    Derek Zoolander TPF Noob!

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  2. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    The effectiveness of optical slave triggers depends on a lot of factors. Ambient light, surfaces to bounce the light etc. Sure, direct line of sight is best but not necessary.

    Will that work with your built-in flash? Probably...but you need to be aware that your built-in flash might fire a pre-flash. If it does, that preflash will trigger these slaves and they won't be able to fire again when the exposure is being made.
    Two ways around this would be to have your built-in flash fire in manual flash mode (no preflash)...but many cameras don't have this option. The other option is to have a slave that is smart enough to ignore the preflash (I don't think these qualify)....so you might be SOL...but that is yet to be seen.
     
  3. Derek Zoolander

    Derek Zoolander TPF Noob!

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    bummer...wish i had my camera here to find out. by chance do you know if a Canon Rebel XS has this option?
     
  4. Derek Zoolander

    Derek Zoolander TPF Noob!

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  5. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    I don't know...but I'd be pretty sure that it does not. I don't think any of the Canon DSLR cameras can be set to have the built-in flash fire manually.

    There is a way to get around this though (if your camera has FEL). Set up your shot and press/activate FEL (flash exposure lock). This fires the preflash early. Then all you have to do is wait for the flashes to recharge (I believe they quoted 4 to 6 seconds) then take the photos. The flash will only fire once this time.

    There is a time limit as for how long the camera will remember the FEL...so make sure you don't take longer than that.
     
  6. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    That radio trigger will get you on your way yes.

    Check out these 'strobist kits' from MPE Strobist 1 light Kits
     
  7. Derek Zoolander

    Derek Zoolander TPF Noob!

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    So that radio trigger...tell me if this is right.

    I would put the transmitter part of it on my hot shoe.
    then i would slide the mini flash into receiver and flash stand.

    Built in flash stays down, click to shoot and the flash would go off?

    I appreciate all your help Big Mike. I'm really trying to get into lighting but want to take it slow and use as little money as possible.
     
  8. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Those mini flashes have a hot shoe right? If so, then yes, that's exactly what you would do.
     
  9. Derek Zoolander

    Derek Zoolander TPF Noob!

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    I'm assuming the left side with the silver nubbin deal is the hot shoe? I always thought the hot shoe was the part on my camera you slide it into...

    [​IMG]
     
  10. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    Yes, that is what it looks like.

    Yes, that is the hotshoe....I should have said the 'foot' of the flash goes into the 'shoe' on the receiver unit.
     
  11. Derek Zoolander

    Derek Zoolander TPF Noob!

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    haha you're rolling your eyes aren't you?
     
  12. Big Mike

    Big Mike I am Big, I am Mike Staff Member Supporting Member

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    :roll:

    :lol:
     

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