He says Metz said to be perfectly compatible, but someone claims to have measured the voltage and slightly exceeds the recommended dose. There should be no problem, there is always some slack security.
Both cameras (EOS 3 and 30D) are good for 250V at either hotshoe or PC connection.
Here is what Chuck Westfall of Canon USA said:
"It's likely you'll never see an official list of all Canon SLRs according to this specification, because Canon Inc. (our parent company in Japan) simply doesn't do things like that. I've been with Canon USA since 1982, so I'm in a pretty good position to know Canon Inc.'s habits. However, I'll be happy to provide you with my unofficial list:
Canon Digital SLRs safe for TCV up to 250 volts: EOS-1D Mark II N, EOS-1D Mark II, EOS-1Ds Mark II, EOS-1D, EOS-1Ds EOS 30D, 20D, 5D EOS Digital Rebel XTi, XT (400D/350D) EOS D6000/D2000, Kodak DCS560/DCS520 (circa 1998) EOS-DCS series (circa 1995)
Canon Digital SLRs safe for TCV up to 6 volts: EOS 10D, D60, D30 EOS Digital Rebel (300D)
Canon 35mm SLRs safe for TCV up to 250 volts: EOS-1V, EOS-1N, EOS-1, EOS 3
Canon 35mm and IX240 SLRs safe for TCV up to 6 volts: EOS 650, 620, 630, RT EOS 850, 750, 700 EOS Rebel Series EOS Elan Series EOS 10s, A2E, A2 EOS IX, IX Lite T90
Canon SLRs released earlier than the T90 did not have TTL flash circuits, and comprehensive information on safe TCV levels is not available.
The trigger circuit voltage (TCV) rating for any EOS SLR is the same on the hot shoe as it is on the PC terminal (if the camera has one), but the acceptable TCV level varies according to the camera model. Incidentally, the main reason for the difference is the way the X-sync signal is generated. With the 250V cameras, the X-sync signal is generated electronically. With the 6V cameras, the X-sync signal is generated mechanically. There are no guarantees, but going forward I anticipate that most if not all future EOS SLRs will be safe for TCV up to 250 volts."
Answers & Comments
Take a look at Photo Strobe Trigger Voltages.
He says Metz said to be perfectly compatible, but someone claims to have measured the voltage and slightly exceeds the recommended dose. There should be no problem, there is always some slack security.
Good luck.
You can see a listing of safe hotshoe voltages for all EOS cameras here:
http://digitaljournalist.org/issue0703/tech-tips.html
Both cameras (EOS 3 and 30D) are good for 250V at either hotshoe or PC connection.
Here is what Chuck Westfall of Canon USA said:
"It's likely you'll never see an official list of all Canon SLRs according to this specification, because Canon Inc. (our parent company in Japan) simply doesn't do things like that. I've been with Canon USA since 1982, so I'm in a pretty good position to know Canon Inc.'s habits. However, I'll be happy to provide you with my unofficial list:
Canon Digital SLRs safe for TCV up to 250 volts: EOS-1D Mark II N, EOS-1D Mark II, EOS-1Ds Mark II, EOS-1D, EOS-1Ds EOS 30D, 20D, 5D EOS Digital Rebel XTi, XT (400D/350D) EOS D6000/D2000, Kodak DCS560/DCS520 (circa 1998) EOS-DCS series (circa 1995)
Canon Digital SLRs safe for TCV up to 6 volts: EOS 10D, D60, D30 EOS Digital Rebel (300D)
Canon 35mm SLRs safe for TCV up to 250 volts: EOS-1V, EOS-1N, EOS-1, EOS 3
Canon 35mm and IX240 SLRs safe for TCV up to 6 volts: EOS 650, 620, 630, RT EOS 850, 750, 700 EOS Rebel Series EOS Elan Series EOS 10s, A2E, A2 EOS IX, IX Lite T90
Canon SLRs released earlier than the T90 did not have TTL flash circuits, and comprehensive information on safe TCV levels is not available.
The trigger circuit voltage (TCV) rating for any EOS SLR is the same on the hot shoe as it is on the PC terminal (if the camera has one), but the acceptable TCV level varies according to the camera model. Incidentally, the main reason for the difference is the way the X-sync signal is generated. With the 250V cameras, the X-sync signal is generated electronically. With the 6V cameras, the X-sync signal is generated mechanically. There are no guarantees, but going forward I anticipate that most if not all future EOS SLRs will be safe for TCV up to 250 volts."