Built in flash vs external flash

[tecboy]

Is Yongnuo YN-565EX a clone of Canon speedlite? These look so similar.

 

[Superfitz]

Is Yongnuo YN-565EX a clone of Canon speedlite? These look so similar.

Externally, yes it is

 

[vincentpaulrevo]

I feel that an external flash is better for a few reasons! You have much more options using one like that compared to one that comes stock, and with the body. The capabilities of doing work with this external flash exceeds the use of a built in flash because of the features that it comes with.

You have more control with an external flash, being on how much flash you can use or even the location of putting the flash somewhere and using it as a slave. One of the biggest features that I can think of for having a external flash is the amount of reach compared to the flash in the camera it self.

I think that the external flash will really help with getting your portraits or photos in general to look more natural when having an issue with low light conditions.
IMO