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Sigma are a Japanese company which produce cameras, lenses and flashes. They're most widely known for their selection of lenses which are compatible with cameras from other manufacturers.

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Can changing metering mode change focus?

I've Canon 600D and I use the back button to focus and the shutter to meter, I've been using spot metering for over 2 years for now and I understand what's the difference between it and evaluative, I ...
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High Speed Sync with Canon 7D and Sigma EF-610 DG Super

Does anyone know how or if high speed sync can be triggered using a Canon 7D and a Sigma EF-610 DG Super? After making all the settings as per the 610's manual, as soon as I meter/focus the camera ...
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How can I fire a Sigma 610dg Super with a TriggerTrap Flash Adapter?

I have a Sigma 610dg super flash that I wish to trigger with the TriggerTrap flash adapter (tt-fa1). Sadly I cannot make this work. I have tried two different TriggerTrap dongles but the flash never ...