Can I use a Canon 430 ex speedlite with a Nikon d90 DSLR? I want to buy a Nikon D90 and use the existing Canon 430 ex. Would it work in TTL or manual mode?


Yes it will fire, but it is unlikely that TTL metering will work properly.

Given that TTL is one of the most important functions of an on-camera flash (speedlight), then I would not advise going with a canon/Nikon mix.

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