Is it necessary for Canon 5d3 to be equipped with a flash? Which flash is better? Is there anything more cost-effective?

5d3 should be equipped with lights. It is not recommended to use domestic cottage lights. The color temperature is not allowed to be said, and the output is unstable. Although the price is cheap, the chain is broken at a critical moment. It has been installed on a 5d3 machine. I don't mind spending 2000,3000 yuan on an original lamp. Sincere suggestion: let's go to the original factory for the lamp. I am a journalist. 5d2+580ex is very good. I used the lamp of Yongnuo ttl.