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vaughny29 Offline Upload & Sell: Off p.1 #1 · Clarification on Triggering 580EX II I just want to clarify something that I believe to be true but I am not great with lighting so I am not sure. I have a Canon 580EX II that I have used on the hot shoe directly of a Canon 20D. I want to experiment with off camera flash more and I have a TTL cord that I found made by Promaster. Will this work for ETTL, and what other options are there for using ETTL for this flash off camera? I believe with the exception of the new flex PW's the other wireless systems will not work with ETTL - correct? But I may be able to trigger it optically? Thanks! Nov 18, 2009 at 07:14 PM

cordellwillis Offline Dedicated FM Upload & Sell: Off p.1 #2 · Clarification on Triggering 580EX II Yes, you can use the TTL cord to do everything you do as though the flash is in the hotshoe. However, you will be very limited to about 2' with the cord unless you DIY extension. With another flash acting as Master on camera to Slave a flash off camera you have ETTL too. However, this has limitations that many do not care for. You can't trigger it optically without an additional optical slave trigger device because the Canon flashes do not have this built in. The new PW TT5 and TT1 can do ETTL. RadioPoppers are getting mostly positive reviews (do a search on here to learn more). There are no other radio triggers that I am aware of that do ETTL. Check out Chuck's site for more info on triggering your flash. Though he does not go into radio slaves you can get an understanding of the use of the Canon flashes. Nov 19, 2009 at 02:06 PM

vaughny29 Offline Upload & Sell: Off p.1 #3 · Clarification on Triggering 580EX II Great - thanks for the explanation! Nov 19, 2009 at 06:41 PM

BrianO Offline Dedicated FM Upload & Sell: On p.1 #4 · Clarification on Triggering 580EX II vaughny29 wrote: ...what other options are there for using ETTL for this flash off camera? I believe with the exception of the new flex PW's the other wireless systems will not work with ETTL - correct? But I may be able to trigger it optically? For radio wireless ETTL, the Radio Poppers seem like a good option. For optical wireless ETTL, using a master-capable flash like your 580EX on camera and a slave-capable flash (or flashes) like other 580s or 430s off camera works well indoors, in my experience, but outdoors in bright light it is less reliable. ETTL cables are the least expensive option, but of course you have the limitations that come with wires. In addition to the OC-E3 cable from Canon, I also use this 24-foot model from Flash Zebra (www.flashzebra.com), which I can combine with optical triggering by running a master off the cable, and using that to trigger the slave(s): Nov 19, 2009 at 10:43 PM

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