I wouldnt use the 45 CT1 on 5Dmk3. The trigger voltage as I read it is around 400volts and if the serial number is below 534000 it can ve as high as 600V. Canons official line re: trigger voltages is (or used to be) 6volts max but that was for early series DSLRs (300d/350d). The newer line of DSLRs (your 5Dmk3 for instance) are rated to a max of 250volts. The information re: the CL1 claims 6-8 volts and should be okay. The above is assuming use in the hotshoe. Firing via the PC sync socket which is more tolerant to higher voltages, but possibly 400-600v!!! is a whole other subject and I would reccommend against it with the CT1 without further investigation. There are adaptors available (Wein Safe-Sync) which can reduce these high voltages to safe levels but it is it really worth it to use an old flash (Manual only too, E-TTL will not work) on a $2000 camera ?
https://www.bhphotovideo.com/c/product/245292-REG/Wein_W990560_Safe_Sync_Hot_Shoe_to.html
http://www.botzilla.com/photo/strobeVolts.html
SOURCE: Will a Vivitar 285HV fry my Canon EOS 40D?
Personally, I would not try it. While the Canon has a protection system built into the camera, the trigger voltage on the Vivitar is pretty high. I have had good results using a 283 on a slave shoe, you will have to stop down more with the extra light
SOURCE: Broken Hot Shoe
This link gives step-by-step instructions with pictures for replacing the shoe.
http://planetneil.com/tangents/2007/05/31/repairing-the-canon-580ex-hotshoe-foot/
SOURCE: AC Power Supply for Metz 45 ct5
Hi daf4,
I have a circuit diagram for the 45CT-5 and the flash unit as well. The voltage is 360V DC, which goes straight across the flash tube. The top pin is positive, when the notch in the socket is on the right hand side, i.e. towards the back of the flash.
I'm also looking for a circuit diagram for a 45CL-4, if you know anyone who has one.
Regards,
Neil
SOURCE: Metz 45 CT 1
I had that same problem also, but mines was temporarly. Ik think the condensor inside the Metz has to regeneratie (recover) itself by using with a full charged fresh batteries. The high freq. sound is normal. (although not to loud) after a 5 MINUTES the orange bulb should light up. How more u used how better the start-up time. My old Metz start-up time was around 40 sec. and now ot is within 7 sec.
SOURCE: Metz mecablitz 45 ct 1 and Nikon D-90
The trigger voltage of the 45CL-1 is about 12V, so it should be safe to connect directly to the hot shoe with an adaptor, or to the pc soclet, if the D90 has one. If the D90 is anything like my Canon 40D, which can stand about 30V on the hot shoe, then all the 45CL series will be ok, as they have trigger voltages between 9V and 12V. The 45CT-5 has a trigger voltage of 15V and works well on the 40D. I use 3 different Metz 45 models with my 40D and all work well on automatic, where the flash sensor itself controls the light output.
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