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This is new and I can't put my finger on it.
Canon EOS 5D MK4, as you know, this has a flash sync shutter speed of 1/200th, which is what I had it set to the other day while doing a small studio product shot.
Camera was vertical (portrait) and I noticed that about 20% of the image on the right hand edge was totally dark. I thought it was my background light not reaching across that far, but then it looked suspiciously like the focal plane shutter was encroaching into the image i.e. shutter speed set faster than the cameras maximum flash duration, in the case of my camera, 1/200th of a second.
The strobes I was using was a combination of Bowens GM500R (with remote receiver cards in the heads and using Bowens Pulsar remote trigger on hot shoe of camera) and Bowens GM500 heads, the latter using the photo cell built into the GM500 heads. I was using Canon EOS utility with camera tethered to MacBook Air.
I fixed the issue by changing the shutter speed to 1/160th of a second, then the shutter curtain did not come into frame anymore.
But the camera has a flash duration shutter speed up to 1/200th of a second so I can't understand why I'm getting this shutter curtain issue.
If I pop my Canon Speedlight 600 EX onto the camera's hotshoe and fire off shots at 1/200th second, there is no problem. I only get this issue with the above Bowens combination.
I must admit, the Bowen's Pulsar trigger, on camera, is twitchy, at best, it works about 8 shots out of 10, the other two the transmitter does not send a signal, though I doubt this has anything to do with the shutter curtain black-out issue on part of the frame.
I was also thinking that the photocel technology on the GM500 head might have something to do with it as I'm triggering the strobes from the Bowens pulsar trigger on camera, which triggers the three GM500R heads (which have reciever card built in) and then when those heads fire they trigger the two GM500 heads photo cells, so perhaps the latter heads are firing off a trifle late due to the daisy-chaining way in which they are the last to receive the signal. A possibility?
Any ideas or suggestions?
Canon EOS 5D MK4, as you know, this has a flash sync shutter speed of 1/200th, which is what I had it set to the other day while doing a small studio product shot.
Camera was vertical (portrait) and I noticed that about 20% of the image on the right hand edge was totally dark. I thought it was my background light not reaching across that far, but then it looked suspiciously like the focal plane shutter was encroaching into the image i.e. shutter speed set faster than the cameras maximum flash duration, in the case of my camera, 1/200th of a second.
The strobes I was using was a combination of Bowens GM500R (with remote receiver cards in the heads and using Bowens Pulsar remote trigger on hot shoe of camera) and Bowens GM500 heads, the latter using the photo cell built into the GM500 heads. I was using Canon EOS utility with camera tethered to MacBook Air.
I fixed the issue by changing the shutter speed to 1/160th of a second, then the shutter curtain did not come into frame anymore.
But the camera has a flash duration shutter speed up to 1/200th of a second so I can't understand why I'm getting this shutter curtain issue.
If I pop my Canon Speedlight 600 EX onto the camera's hotshoe and fire off shots at 1/200th second, there is no problem. I only get this issue with the above Bowens combination.
I must admit, the Bowen's Pulsar trigger, on camera, is twitchy, at best, it works about 8 shots out of 10, the other two the transmitter does not send a signal, though I doubt this has anything to do with the shutter curtain black-out issue on part of the frame.
I was also thinking that the photocel technology on the GM500 head might have something to do with it as I'm triggering the strobes from the Bowens pulsar trigger on camera, which triggers the three GM500R heads (which have reciever card built in) and then when those heads fire they trigger the two GM500 heads photo cells, so perhaps the latter heads are firing off a trifle late due to the daisy-chaining way in which they are the last to receive the signal. A possibility?
Any ideas or suggestions?