John Gulliver
Contributor
A friend and I spent a very frustrating hour yesterday trying to test my "new" (lightly used) strobes. With the strobes set to TTL, EV +/-0 and each strobe connected direct to the housing by a fibre-optic cable, we tested the following camera settings: aperture varying between 4.5 and 10, shutter speed 1/160, ISO 200, internal flash output 1/64. The batteries (NiMH) were fully charged and we could see that light was transmitted through the cables, so they were intact. However the internal flash simply would not fire although the red ready light lit up. What did we do wrong?