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<blockquote data-quote="FastGlass" data-source="post: 368575" data-attributes="member: 13822"><p>Setting the built in flash to commander has three options depending on the camera model. TTL, AA, Manual. Depending on how the photographer wants the CLS to act depends on what setting within the commander menu is chosen. I don't believe if choosing manual, the option for the speedlight acting in TTL is possible. If choosing manual within the commander. Setting it to it's lowest setting as not to contribute to the exposure, not sure if that carries over to the speedlight. If choosing TTL the internal flash's output is so minimal it doesn't add to the flash exposure. The internal meter for the camera doesn't care if a flash is on the camera or not. It's reading only ambient light. It's the preflash from the speedlight that is going to determine what it thinks is the best exposure. If the resulting image seems over or under exposed than adjust the comp + or -. Keep in mind that when introducing third party flash units, some functions won't be supported. Not sure if the combination mentioned will have all the options. Wayne is the guy to ask about flash. Maybe he'll chime in.</p></blockquote><p></p>

[QUOTE="FastGlass, post: 368575, member: 13822"] Setting the built in flash to commander has three options depending on the camera model. TTL, AA, Manual. Depending on how the photographer wants the CLS to act depends on what setting within the commander menu is chosen. I don't believe if choosing manual, the option for the speedlight acting in TTL is possible. If choosing manual within the commander. Setting it to it's lowest setting as not to contribute to the exposure, not sure if that carries over to the speedlight. If choosing TTL the internal flash's output is so minimal it doesn't add to the flash exposure. The internal meter for the camera doesn't care if a flash is on the camera or not. It's reading only ambient light. It's the preflash from the speedlight that is going to determine what it thinks is the best exposure. If the resulting image seems over or under exposed than adjust the comp + or -. Keep in mind that when introducing third party flash units, some functions won't be supported. Not sure if the combination mentioned will have all the options. Wayne is the guy to ask about flash. Maybe he'll chime in. [/QUOTE]

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