TTL with Multiple Flashes? | Ask David Bergman
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- Опубликовано: 20 июл 2024
- Today's question from Amer D. is, "When using multiple flashes in the same optical group, does E-TTL fire them all at the same power? What if some of those flashes are larger or more powerful while others are smaller like the Canon 600EX and the 430EX? The camera has no clue which way the flashes are pointed, so how does it know what to do?"
Go to www.AskDavidBergman.com to submit your own photo question, see David's gear list, and view the episode archive.
00:00 Intro
01:15 What is TTL?
03:39 TTL with one flash
05:05 Canon ST-E3-RT version 2 TTL power
05:38 Face priority flash metering
06:59 Multiple flashes in one TTL group
10:44 TTL ratios
12:50 TTL with different flashes
13:31 Individual group TTL control
12:54 How do I shoot?
16:03 Outro
As Luke Combs' tour photographer since 2019, David Bergman has documented the historic rise of the reigning CMA Entertainer of the Year both on stage and off. But that's only the latest in Bergman's own storied 30+ year career. He spent nearly a decade traveling the world with Bon Jovi and has toured with other artists including Barenaked Ladies, Sarah McLachlan, and Gloria Estefan. As a sports photographer, he covered numerous Olympics, Super Bowls, and World Series games, and has 13 Sports Illustrated covers to his credit. He's also photographed eight US Presidents, the Queen of England, and Cuban dictator Fidel Castro. However, his proudest accomplishment is his work as a photo educator, where he has given back to the industry that has treated him so kindly. Through his unique "Shoot From the Pit" live concert workshops, Bergman has taught hundreds of aspiring music photographers in a real-world setting. His work as a Canon Explorer of Light, Adorama RUclips host, and public speaker has also helped photographers around the world advance their photography skills.
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✘ PRODUCTS USED:
Canon EOS R5 Mirrorless Digital Camera Body
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Canon RF 24-70mm f/2.8 L IS USM Lens
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Canon Speedlite 600EX II-RT Shoe Mount Flash
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Canon ST-E3-RT Speedlite Transmitter, Version 2
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Westcott Rapid Box Switch Octa-M
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Westcott 40-Degree Egg Crate Grid for Octa-M
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Westcott Bruce Dorn Triple Threat Bracket
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Flashpoint Shoe Mount Triple Bracket with Swivel Umbrella Holder
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Flashpoint Shoe Mount Triple Bracket
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Manfrotto Quad Bracket for Ezybox
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Glow S-type Bowens Mount Bracket for Speedlites and Flash
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✘ PRODUCTION EQUIPMENT USED:
Canon EOS R Mirrorless Full Frame Digital Camera Body
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Canon RF 24mm f/1.8 Macro IS STM Lens
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Manfrotto MT055XPRO3 Black Aluminum Tripod with MVH502AH Pro Video Head
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CLAR Illumi Max 500 High Power 5600K LED Light
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Glow EZ Lock Octa Quick XL Softbox With Bowens Mount (48")
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Prograde Digital 512GB SDXC UHS-II V90 Memory Card
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All Prograde cards and readers
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THANKS SO MUCH FOR WATCHING! 
Хобби
So glad that I am at the point in my photography when a video like this makes perfect sense. I’ll never use the 600’s but it’s still nice to know how things work generally. Very informative! Thank you Sir.
Flash in photography has literally been like learning a new language. There's so many acronyms and different devices and attachments. It's been a learning experience for sure lol
David - I really liked this video. What a great help! Do you have or could you do a video on portraits with a Canon and Speedlites in manual mode?
So the object is to know how one wants the light the subject in different setting indoors or outdoors plus what the background is like to the subject when on then gun and run with a moving subject it best to know the area one is shooting . great coverage David
one of the best questions and best answers.
A detailed and well thought out answer to a difficult question. Thank you.
Thank you, David !
Great video David, very well explained. Thank you.
Thanks David! Always great info!
Great explanation, thank you!
I was literally looking for a video like this a few days ago
I like the video, it's a clear and well presented, I just have one comment. I wonder why people still keep repeating that the camera sets the exposure by averaging over the whole scene, even if they often have to admit that they had to change its settings to make it actually behave like that. 15 years ago, my first DSLR (Canon 400D) was already using evaluative metering by default and I suspect that even the Olympus C-4000 compact camera I bought in 2003 might have. After watching this tutorial, I checked the E-TTL settings of my current camera (which I'm pretty sure I haven't changed) and... no surprise, it's evaluative with face priority. Sure, it's not perfect and I understand that many people, in particular those working mostly in a controlled environment, prefer manual exposure; but I don't think it's necessary to make automatic exposure look dumber than it actually is.
Thank you. Great breakdown.
Purchased a pair of Yongnuo 568EX3 with 2 triggers and a remote (all second hand) about a year ago, but I have not quite learned how focused them properly
Well explained!!!👌👍
Would spot metering help out?
Good information, mostly I use speedlites for run and gun shooting. Btw you should name your mannequin I vote for Bounce flash Betty! Lol
LOL love that!
Great video as always David. I do have a question though. I have the ST-E3-RT and several Canon lights. The problem I have never been able to resolve is the link between the ST-E3-RT and light drops after a few minutes and the only way to re establish the link is to turn both units off and then on again. I have turned off the “sleep” function on both but the problem persists. This happens with both a version 1 and a version 2 ST-E3-RT to the point it is unreliable at events. Others on RUclips have also experienced this. Any suggestions would be appreciated.
If you are at the venue where strong router, dual WiFi router, or too many wifi, the link will drop. Only way is far away from WiFi or the venue has only one WiFi or put flash as higher as you can like 12 ft or more away from WiFi, it might less likely drop the link.
Wouldn't just using a flash meter be a whole lot easier
Just like anything else in the digital age, there are multiple ways to do the job. Tools are tools, the end result is what counts. When I was shooting chromes I used a flash meter AND a Polaroid back. Now, I can look at the LCD screen and histogram and do the same. In real time, the time it takes to zero in an exposure with multiple pops with a meter as opposed to multiple pops looking at the result is almost exactly the same, plus you know you are getting what you want when it LOOKS right. And as David points out, TTL is for when you can't take that time, and a flash meter won't work then either.
If you want to measure each flash separately and then dial in the exposures manually, then go ahead. For me, it's easier to see the exposure of each flash after taking a test shot, and then dial it in manually as needed.
I'm a 20 year professional, and this was a brain strain for me! 🤯 moral of story, don't use TTL for multiple flashes 😂😂
Yup! That would have been a much shorter video. 😂