A:AnswerThe previous caller was correct. With fresh batteries/recharged. It should/most turn on.
It is best to use the other method of fresh/RECHARGED in the flash. And as long as the camera is functioning/turns on and operates. Then you will have the perfect test. Both turned on and fully powered.
A:AnswerIf this is for professional use, no! The plastic screw in foot that is included with this is made of plastic. And we know what happens to screws in plastic when we use it too many times! Which We Will
A:AnswerI bought it to use with Canon bodies as a slave unit. I would imagine it can be used with canon or nikon provided there is a hotshoe. Sorry I can't be more specific. The best bet would be to buy something like a Canon speedlight or one that says it's specifically compatible with your camera. Prices go up significantly when purchasing better equipment, but so does capability and quality.