Nikon SLR Cameras

What is the purpose flash that is movable on nikon d3100?

Bell
Bell

It is kinda awkward to see that…

Andrew
Andrew

It retracts so that the tube can be protected when not in use. At least, I think that's what you're asking, your English leaves something to be desired.

Guest
Guest

The flash needs to be in a higher position or as far away from the lens to prevent casting a shadow from the lens body.

Stephen Cheatley
Stephen Cheatley

If you want to get into flash photography you would be wise to get a dedicated flash unti for the hotshoe.

The pop up flash is very good for close subjects. Remember when using wide angle that the lens hood, or even the lens may obstruct some of the flash, causing a shadow.