Inon Z240 & Canon G9 & Canon housing

[Richard H]

I understand that the above strobe won't work on a TTL basis (auto exposure) with Ikelite housing. Will it work with a G9 and the canon WP DC 21 housing ? From what I've read I understand that through fibre optics TTL is achieved with this set up (G9, WP DC 21 housing, Z240 Inon)

Can someone clarify please ?

Thanks a lot

 

[kerryw]

I understand that the above strobe won't work on a TTL basis (auto exposure) with Ikelite housing. Will it work with a G9 and the canon WP DC 21 housing ? From what I've read I understand that through fibre optics TTL is achieved with this set up (G9, WP DC 21 housing, Z240 Inon)

Can someone clarify please ?

Thanks a lot

I use a pair of Z240s with a G9 in a Patima housing and they work great set to S-TTL.. here is some info lifted from Reef Photo's KB

• S-TTL (Optical Synchro TTL)
  

This mode provides automatic exposure control with most cameras which utilize a 'pre-flash' and are housed in a transparent housing. In this mode, the INON strobe mimics the camera on-board flash. The camera controls the external strobe without being aware of its presence, with the camera flash and the fiber optic cable being the controlling link.

As the camera fires a pre-flash to determine proper exposure, the INON strobe also fires a pre-flash. The camera 'thinks' that the reflected light is its own, and adjusts exposure and flash duration accordingly.

The same process is repeated for the exposure, with the camera flash firing and the INON strobe precisely mimicking its duration down to the microsecond. (Strobes do not vary power or intensity, only the duration of the flash. Remember, the speed of light is 186,000 miles/sec., so all of these calculations, firing and quenching occur very, very quickly.)

The S-TTL Low setting cuts down the duration of the exposure flash if the strobe is producing over exposed images.

The right-hand knob should be set to the 'B' position. Changing this knob to 'A' or 'C' allows additional flexibility by adjusting EV compensation up or down for fine tuning your S-TTL results.
​

 

[Richard H]

Thanks a lot. Do you think the canon housing could make a differebce prreventing STTL ?

 

[kerryw]

Thanks a lot. Do you think the canon housing could make a differebce prreventing STTL ?

I believe the only issue would be how to attach the fiber optic cable, but I've never seen the housing, best to e-mail someplace like Reef Photo and ask..

I'm sure others on here would also have the answer.

KLW