having issues on my wireless trigger and another question

Discussion in 'Lighting and Hardware' started by stylish225, Nov 27, 2015.

  1. stylish225

    stylish225 TPF Noob!

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    Hi

    I am kind of a newbie in lighting photography.

    recently i bought a cheap wireless trigger MEIKE MK-RC10N.

    my problem is, my speed lights (nikon sb-900, triopo tr-180n and godox ad 360 all) dont flash correctly when i trigger a signal through the MK-RC10N.

    they flash but not correctly. underexposed every time. even though i set up the power of speed light to be full manually, it seems like only one third maybe less light is reflected in the photo taken with them. i dont understand why this is happening. of course i questioned this to the manufacturer and supplier but no one even tried to figure this out. that is why i am posting this here expecting maybe some of experts could help me out.

    another question is about total power of synced speed lights. i assumed that the total power is same no matter which one is on or off camera if there are two speed lights. for example,

    1) sb-900(on camera on hot shoe) + ad-360(off camera by light sync)
    2) ad-360(on camera on hot shoe) + sb-900(off camera by light sync)

    i guessed the both abovementioned should be same but it was turned out that my assumption is not correct when i found the outcome of the test. the second setting is way brighter than the first one.

    i am wondering how my assumption is wrong and also if there is any possible way to get the identical exposure using two speed lights regardless of their position.


     
  2. tirediron

    tirediron Watch the Birdy! Staff Member Supporting Member

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    Post a couple of sample images with full EXIF data.

    -Are you shooting at/below sync speed?
    -Is the trigger a TTL-enabled trigger or a 'dumb' trigger?
    -Is the amount of under-exposure always consistant and have you verified it by doing a guide-number calculation?

    In order to determine flash exposure correctly, you need to either do a guide-number (GN) exposure calculation or have a flash meter.
     

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