Canon 7d and Jessop 360AFD

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ojo

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Hi

Okay:

Aim: to use the 7d's internal flash to trigger, remotely, the external flash which is mounted elsewhere.

Setup:

The 360 is in 'slave' mode.

The 7d has the flash popped up and selected 'wireless func. enable', wireless func (second one down, looks like a shaving brush).

Point at object and focus - flickers and sets off flash but that's only to be expected.

Wait for flash to recharge and click - internal flash sets off external flash.


Problem: View image and it is dark, as in no flash recorded. Possibly shutter released before/after the flash.

What am I doing wrong and how can I remedy it? Is it possible with the lack of information I am giving? Sorry, I am at work so cannot give settings.

O
 
It's an issue with the Jessop 360 AFD. I use mine on my 550D and am pretty happy with it. As I understand it, the built-in flash on the 550D, sends out a preflash to 'test' the exposure. The pre-flash set off the 360AFD and it can't recharge in time for the main flash from the built-in flash, which is timed to go off when the shutter is open. I guess the only options are a dedicated hotshoe cable or preferably a set of flash triggers, which I believe only let you use the flash manually (unless you pay for the far more expensive ones).

I'm making an assumption that the 7D works the same in this respect as the 550D.

EDIT: Just re-read your post again, the 360 AFD uses an optical slave mode not a wireless slave, so using that mode will not have any effect here.
 
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I'm afraid the Wireless function option is for Canon flashes only so the on camera popup flash is used for metering then fire's the off camera flash. You might find it's due to the pop-up flash is metering (pre-flash) which is triggering the 360 thus when press fully the flash has not had time to re-charge...I would look to see if you need to enable the 360 in a specific mode to look for the metering on the popup flash..

You could also find the power setting on the flash is not high enough for the shutter speed you have.

Dan.
 
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pauljs said:
It's an issue with the Jessop 360 AFD. I use mine on my 550D and am pretty happy with it. As I understand it, the built-in flash on the 550D, sends out a preflash to 'test' the exposure. The pre-flash set off the 360AFD and it can't recharge in time for the main flash from the built-in flash, which is timed to go off when the shutter is open. I guess the only options are a dedicated hotshoe cable or preferably a set of flash triggers, which I believe only let you use the flash manually (unless you pay for the far more expensive ones).
Click to expand...

Hi

Yea, I'd worked around that by either covering the IR sensor with my hand while it focussed or waiting 10 seconds for the external flash to recharge. The external flash does light up but it is not syncing with the shutter, if you see what I mean.
 
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I had the same problem with the same two pieces of equipment but found you could get around the problem if you manually changed the power output of the flash.

I think 1/2 power or less worked OK.

Incidentally, the Nissin Di866 works well with the 7D wirelessly.
 
pauljs said:
I'm making an assumption that the 7D works the same in this respect as the 550D.
Click to expand...

My assumption was wrong then, sorry! I can't reduce the power of my pop-up flash on the 550D, shame :'(
 
Thanks for the replies so far.

So it may be worth playing around with the external flash's power? I can see it trigger (to the dismay of my retinas) but it is simply leaving the subject unlit, almost as if it is slightly out of step with the shutter.

I have tried it on various shutter speeds from 1/30 to 1/250 and no joy.

It seems to work fine in daddy mode when attached to the hot shoe.
 
ojo said:
So it may be worth playing around with the external flash's power?
Click to expand...

No, you need to reduce the power of the built-in pop-up flash, to eliminate any pre-flashes.
 
Jessops 360 only has a basic optical slave I think, so it goes off with the pre-flash and is out of sync.

You need to disable the camera's pre-flash, which luckily you can do on a 7D by switching the pop-up to manual.
 
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