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FORUMS General Gear Talk Flash and Studio Lighting 
Thread started 02 Mar 2012 (Friday) 01:22
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600EX RT GN number

 
psxindo
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Mar 02, 2012 01:22 |  #1

So is the 600ex more powerful than 580exII? I don't quite understand GN

600ex GN is 60 @iso100 200mm
580exII GN is 58 @iso100 105mm


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ROGERWILCO357
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Mar 02, 2012 02:23 |  #2

also will the new flash work with the older flash units on the 7d or 5d2?


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boerewors
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Mar 02, 2012 07:13 |  #3

Sounds like canon hit a flop cheating with GN numbers.


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Trailboy
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Mar 02, 2012 07:56 |  #4

ROGERWILCO357 wrote in post #14004675 (external link)
also will the new flash work with the older flash units on the 7d or 5d2?

Yes, they have the optical and radio systems built in.




  
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bsmotril
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Mar 02, 2012 08:11 |  #5

Also there is a standalone hot shoe mounted wireless transmitter to replace the optical ST2 unit of the old system.


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Mar 02, 2012 08:36 |  #6

So am I understanding correctly? I can mount the 600EX on the camera and trigger another 600EX via RF and a 580EX via optical simultaneously with ETTL-II. Is that right? But still no RF receiver for the 580EX to work with the new ST-E3-RT. Right??


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tiler65
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Mar 02, 2012 09:23 |  #7

Trailboy wrote in post #14005885 (external link)
Yes, they have the optical and radio systems built in.

But not so good in bright sunlight or even slightly out of view..... realistically, Canon are wanting us to buy two new units...a 600ex & St-e3 or 2 600ex for the radio to work and that is gonna kill someone's credit card.


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elv
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Mar 02, 2012 09:54 as a reply to  @ tiler65's post |  #8

You can't use optic and radio at the same time though, so its all optic or all 600EX via RF at this stage.

The guide number is the same for the 580exII and 600exRT at 105mm.

Syl Arena has the best hands on info so far - http://pixsylated.com/​blog/ (external link)


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Yasmin
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Mar 02, 2012 10:17 as a reply to  @ elv's post |  #9

Will this be the final nail in the coffin of Flextt5 for Canon?

Y.




  
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inkista
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Mar 02, 2012 11:41 |  #10

psxindo wrote in post #14004431 (external link)
So is the 600ex more powerful than 580exII? I don't quite understand GN

600ex GN is 60 @iso100 200mm
580exII GN is 58 @iso100 105mm

Usual fudging. Syl Arena in his reviews of the units (external link) has stated it's the same power output as the 580s, it's just the zoom that's inflating the number. The higher the zoom, the narrower the beam, the farther the light goes.


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Wilt
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Mar 02, 2012 13:33 |  #11

psxindo wrote:
So is the 600ex more powerful than 580exII? I don't quite understand GN

The 600EX has GN85.2 with 28mm lens coverage angle (according to what few specifications are currently provided by Canon USA marketing...the user manual is not yet available online); the 580EX has GN98.4 at the same 28mm lens coverage angle.

Once again, flash power 'specifications' are a bunch of hooey by manufacturers trying to confuse buyers about what is 'better'.


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SMP_Homer
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Mar 02, 2012 14:32 |  #12

Yasmin wrote in post #14006912 (external link)
Will this be the final nail in the coffin of Flextt5 for Canon?

The Canon transmitter costs 2X that of the Flex (or Mini)
The PW Flex system can be used with more than just 1 flash model - a 430EX 2 + TT5 is cheaper than a new 600EX

I can't wait to see more on the new Canon flash stuff - but I don't see it as a Flex Killer....


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snaphappyphotography
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Mar 02, 2012 14:43 |  #13

I need to know if two masters can fire the same slave. My wife and I shoot wedding receptions simultaneously with multiple soft boxes around the dance floor and we both utilize the slaves at the same time via Radio Poppers. I can't imagine why the new Canon system wouldn't allow you to fire a slave from two different masters, but I would like to know for sure.


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SMP_Homer
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Mar 02, 2012 15:36 |  #14

snaphappyphotography wrote in post #14008708 (external link)
I need to know if two masters can fire the same slave. My wife and I shoot wedding receptions simultaneously with multiple soft boxes around the dance floor and we both utilize the slaves at the same time via Radio Poppers. I can't imagine why the new Canon system wouldn't allow you to fire a slave from two different masters, but I would like to know for sure.

it should work with the new system - a slave (or remote flash) can't tell the difference between 2 different masters if both masters are configured the same

I also do it with the PW Flex system...


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Sig35A, Sig50A, Sig85A, Sig14-24A, Sig24-105A, Sig70-200S, Sig150-600C
100-400L, 100L, 300 2.8L, 1.4x II / 2x II
600EX-II X3, 430EX-III X3

  
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snaphappyphotography
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Mar 02, 2012 15:40 |  #15

Here's what another photographer said:

on the new 600EX , it seems that as well as setting the channel you enter a code . the explanation in the video is to stop the slave from fireing from some other users master.
but I would think if both you and your wife had the same channel and same pass code then the slave would not know what master triggered it.

So that sounds ok, but the code thing bothers me a bit. Hopefully, the code isn't exclusive and two people can enter the same code


D800, D700, MB D10, 85 1.4G, 70-200 2.8G VR II, 16-35 f4G VR II, 60 2.8G Micro, SB 910 (x4), SB 900, Radio Popper PX Trans (x2), Radio Popper PX Rec (x3)

  
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600EX RT GN number
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