Image Size:
You can choose the size of your picture 4:3 this is the old standard 35mm size that used
to be common during the SD era of TVs. 16:9 this is the common size for HD capable
devices and 3:2 is the traditional size for printed photos (3:2 P4P).
Image Format:
In this area, you can choose between taking photos in RAW, JPEG and RAW + JPEG. (NOTE
Spark can only take pictures in JPEG) Read this article for a more in-depth look at RAW
vs. JPEG.