More so than any other camera manufacturer, Canon has made a variety of changes to their TTL protocol over the years. Our Canon TTL converters have several programs built in to fine-tune your strobe exposure to the specific camera model you are shooting with. Switching between programs is quick easy using just the button on the side of the converter.
Additional Reading
DL5 DS Link Canon TTL Converter Ikelite CT1 Hotshoe Kit
The Myth of TTL Strobe Exposure Underwater
TTL Testing and Troubleshooting