Nick01306 0 Posted August 8, 2021 Anyone using a Canon without a 'com' port with Inon strobes via a synch lead? I have just upgraded from a 5D in a Seacam housing (5D has a 'com' port) with Inon Z240 strobe/s to a 60D in a Seacam. Can't get the Inons to fire when the shutter releases. Anyone got around this please? I don't want to use TTL, just get the flash to fire at the right time through the hot shoe connection on the camera... Don't want to go to an optically triggered system. Share this post Link to post Share on other sites
JimG 27 Posted August 8, 2021 Sorry to be dim but is a com port another name for a Nikonos-type bulkhead. Never heard of that before. FWIW, I use a 5d3 & 2 Inons in manual mode without any problems Share this post Link to post Share on other sites
Nick01306 0 Posted August 8, 2021 Thanks for the reply, Jim. Not 'dim' in my book. Never seen a 5D3, mine is a 5D original. The com port is on the left of the camera under a rubber flap and is a simple 2-contact concentric plug with a screw-in retainer. I don't know what 'com' actually means in this context. I aslo run the Inons off this with no problems, one on a Nikonos port and one about to be on an S6 connector as the Nikonos one has got too scabby. The whole rig has had a lot of use in some poor conditions and been bomb-proof reliable. Are you running your Inons off the hot shoe please? Share this post Link to post Share on other sites
Tom_Kline 143 Posted August 8, 2021 (edited) I have used Inon strobes (220 and 240 models) with Canon 1D series cameras (see signature) in Seacam housings with no problem. I have always used the hot shoe connector. Never heard of using a communications port for flash synch! There is a standard PC connector on most cameras for old style wired flash synchronization but I have not used one of these with a Seacam housing yet. PS. The hot shoe connector is wired to S6 bulkheads in my housings as delivered by Seacam in my current housings (I had to "steal" a bulkhead to allow remote control in some of my earlier housings). Edited August 8, 2021 by Tom_Kline Share this post Link to post Share on other sites
TimG 62 Posted August 8, 2021 7 hours ago, Nick01306 said: Anyone using a Canon without a 'com' port with Inon strobes via a synch lead? I have just upgraded from a 5D in a Seacam housing (5D has a 'com' port) with Inon Z240 strobe/s to a 60D in a Seacam. Can't get the Inons to fire when the shutter releases. Anyone got around this please? I don't want to use TTL, just get the flash to fire at the right time through the hot shoe connection on the camera... Don't want to go to an optically triggered system. Hey Nick As Tom sets out, I'd have thought it unusual NOT to use the hot shoe connector. I've never heard of anyone using "com" port. I've been through a number of housings and cameras over the last 20+ years - admittedly not Canon - and have always used a hot shoe sync. Share this post Link to post Share on other sites
Tom_Kline 143 Posted August 8, 2021 (edited) PPS. The housings where I used a PC cord were from the 1950s to the 1970s! Hydro 35, Rollei and Hasselblad housings for use with cameras without hotshoes. The Nikon F and F2 (Hydro 35 vintage) had accessory flash shoes that fit over the rewind crank - none on the prism! Edited August 8, 2021 by Tom_Kline Share this post Link to post Share on other sites
ChrisRoss 150 Posted August 9, 2021 What you are talking about is a PC connector - a system as old as the hills for triggering strobes and probably still used for this purpose on studio strobes, but very rarely anywhere else. I'm assuming your issue is the 60D does not have a PC connector? If you want to keep using this on a 60D you could order a PC to hotshoe converter: https://www.camerahouse.com.au/promaster-hot-shoe-pc-sync-adapter assuming there is space in the housing for it and use your old bulkheads that connected to the PC terminal. I'm not clear on what you are trying to use now to trigger in the new housing. Presumably the housing came with a hot shoe connector connected to a bulkhead. If this is the case it is always possible that the new connectors/bulkheads are faulty. If this is what you are trying to do then try this troubleshooting guide to work out where the issue is: https://reefphoto.com/blogs/lighting/troubleshooting-strobes-with-electrical-sync Any more information you have would be useful, it sometimes minor details that help when trouble shooting. Perhaps a photo of the bulkhead connector you are currently using? Share this post Link to post Share on other sites
