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Plainplane
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Posts: 630
Joined: Thu Mar 27, 2008 7:50 pm

Looking For External Flash For Cockpit Shots

Sun Apr 04, 2010 3:44 pm

I have a Canon EOS 7D and I want to start using it for cockpit shots, and to make them perfectly exposed I want to use an external directional flash that would mount on the top of the camera. The plan is to focus on the outside, while aiming the flash at the overhead panel to bounce back onto the rest of the cockpit for a perfectly exposed shot, a method that I learned about in other forum topics that is supposedly the best way to do it.

How do I determine what flash would better suit this need though? Would something like the fairly inexpensive Speedlite 270EX suffice, or would I need something like this one?

Thanks in advance.
 
dazbo5
Posts: 2717
Joined: Tue Mar 29, 2005 8:05 am

RE: Looking For External Flash For Cockpit Shots

Sun Apr 04, 2010 6:16 pm

Plainplane,

The 270 might not be powerful enough for your needs and only has mimimal adjustment for bouncing the light. A 7D deserves more really! The guide number (first two digits of the model on Speedlites) gives you an idea of the brightness (effective distance) at ISO100, f/1. The 270 would only give you an effective range of 9ft at ISO200, f6.3 for example or 18ft at ISO400, f6.3. Always go for the most powerful flash you can afford, on the basis that you can always use a powerful flash at 50%, but you can't use a less powerful flash at 150%. Bear in mind you need extra power when bouncing light. I use a 430EX with Stofen diffuser and it's always done what I've asked of it. The 580 might be a bit much for what you need but if you can afford it, go for it otherwise the 430EX II is a good choice and not much more than the 270 if you shop around.


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Darren
Equipment: 2x Canon EOS 50D; Sigma 10-20 EX DC HSM, 50-500 EX APO DG, Canon 24-105 f/4 L, Speedlite 430EX
 
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Plainplane
Topic Author
Posts: 630
Joined: Thu Mar 27, 2008 7:50 pm

RE: Looking For External Flash For Cockpit Shots

Sat Apr 17, 2010 4:48 am

Hi Darren,
Thanks for the advise. I purchased the 430EX II.

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