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Underwater flash S2000 + Canon g7x

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#1 uffaufo



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Posted 03 January 2017 - 02:57 AM

Hi all -


I am new to underwater flash photography - yet not new to [underwater] photography.


I am trying to use 2 x Inon S2000 with a Canon G7X. I do NOT have optical cables and the flash are triggered wirelessly.


I am using this setup above water to get acquainted with it, but I am not getting the results I want/expect to see.


I have tried to set the Canon G7X to manual flash, but pictures get blown out. For the beginning I would like to stay away from manual mode.

Therefore, I set the S2000 to S-TTL and the Canon G7X onboard flash as AUTO. Pictures come out darkish, and most importantly, as I change the S2000 power output (turning the EV dial) I do not see any relevant change in the picture output, that is no change in ISO, time and aperture.


(The camera *seems* not to use any pre-flash to adjust exposure but I might be wrong).


What am I doing wrong?





#2 ameyer


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Posted 03 January 2017 - 06:36 AM

I would try it again by using a fibre-optic cable.
Setup on Camera with Auto is correct.
Link to the compatibility chart from Inon for the S2000:
Kind regards,

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#3 uffaufo



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Posted 03 January 2017 - 08:44 AM

Hello Andreas,


thanks a lot for your reply!


I was hoping to save some money at the beginning and try not to buy optical cables. I wanted to divest on underwater photography equipment and went for a Meikon housing, and honestly I don't know which cables are compatible with it (optical D-cable type L or LL for the flash, but I don't know the housing endpoint).


From this chart, it looks like the two should be working also wirelessly:




I'll try to do some more tests...

#4 uffaufo



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Posted 03 January 2017 - 08:50 AM

I have tried again and placed the strobe in such a manner that its light sensor was 2cm in front of the camera flash.


I turned the EV dial on the flash but I always get the same exposure on the camera...

Edited by uffaufo, 03 January 2017 - 08:51 AM.

#5 Timz


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Posted 09 January 2017 - 04:42 PM

what abt ur camera exposure setting?? Is it on manual, Av, S, P or Auto..?

What abt the magnet switch on the S2000?

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#6 uffaufo



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Posted 25 March 2017 - 02:02 AM

Hi guys,


I think I could use a good help from you as I am lost. I am leaving soon for Seychelles and as of now I cannot operate the flash correctly.


I have done a test using a Olympus EM5 Mark II with flash set on AUTO.

The S2000 was also set to STTL.

I have done 3 shots facing a mirror with the second lever set to B (12 o'clock) that should be with no exposure compensation, then turning clockwise at position 3 o'clock (decreasing flash power output) and then turning it counter-clockwise at position 9 o'clock (to increase power output). All the 3 pictures came out exactly identical with no change in aperture or speed or ISO:






What am I doing wrong? Any help is going to be highly appreciated!

Edited by uffaufo, 25 March 2017 - 02:19 AM.