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Thread: Pre-flash?

  1. #1
    Senior Member Rawfa's Avatar
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    Pre-flash?

    Hey guys,

    Ive shot a couple times with my A7s and an F20M and this flash always pre-flashes a couple of seconds before firing, which makes is useless for events on small places. I was wondering if its just the F20M or if the F43M, the Nissin I40 and other flashes do this too. I need to buy 2 flashes and I cannot find them here in Brazil, so it would really suck if ordered 2 units and they both had the same problem as the F20M.

    P.S The F20M would fire straight away on the A99

  2. #2
    Senior Member ecsh's Avatar
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    Re: Pre-flash?

    Might be because you have red eye reduction on?

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    Senior Member Rawfa's Avatar
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    Re: Pre-flash?

    Quote Originally Posted by ecsh View Post
    Might be because you have red eye reduction on?

    Man, so easy!! Ive googled this and many people were saying it was the only way the camera was able to calculate the necessary flash intensity. Just turned off red eye redution on both A7s and it works! Thanks!

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    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Pre-flash?

    LOL This one was for my daughter as she is about 7 weeks away from giving me my first grandchild. Interesting setup though the F20M on my A7r but with a twist a Sigma 18-35 1.8 APS lens but shot FF at full zoom of 35mm which i can do with this lens is shoot it full resolution at 30mm and higher. Pretty handy dandy little feature when needed. I was traveling light on vacation with the Sigma and a Canon 17mm TSE. But anyway this little flash did a great job of filling in. shot at 1/160 at 5.6

    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com
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  5. #5
    Senior Member Rawfa's Avatar
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    Re: Pre-flash?

    That is lovely, Guy. Congrats on the photo and more so on the grand kid

    So, youre able to use the Sigma 18-35mm 1.8 in FF mode from 30mm to 35mm? This is such an amazing lens. I really wish Sigma would come up with a FF 24-50mm f2.0.

  6. #6
    Administrator, Instructor Guy Mancuso's Avatar
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    Re: Pre-flash?

    Thanks Rawfa, yes this lens you can go from 30 to 35mm full res on the A7r which is pretty dang good too.
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

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