Photo proportion

Hello everybody!

Since i have my ipod 5 i noted that alle the photos i take only use a portion of the screen. But when I make a video all screen is used.

There is a way to change the proportion of the photos in order to use all the screen? I cant see taht opcion in my device.

Thanks in advance!

PD: Sorry for my english, I'm from Argentina / South America

Alejandro