I recently purchased a used Aquatica housing for the Canon 20D that had the Henrich eTTL converter installed. When I attempt to use the Ikelite strobe in TTL mode, I end up with pictures that are completely underexposed. The strobe appears to be working fine when set in manual mode.
In all of the reading I have been able to find, it seems that Heinrich is saying that it is a problem with only getting the preflash fromt the strobe - and must be attributed to the cable.
Aquatica 20D Housing (with dual Nikonos style connectors)
Heinrich eTTL converter
Ikelite DS-160 strobe
Iklelite 4104.62 synch cord
Thanks in advance.