Lowepro Flipside 200 AW developing and it runs on a

and it runs on a pair of not-so-cheap CR123 batteries

allowing you to connect up to three flashes

It has autofocus capabilities for compatible Pentax cameras

Putting a filter on it will be tricky

Very well made

Lowepro Flipside 200 AW developing and it runs on aThe Lowepro Flipside 200 AW is a compact backpack sized to hold a small to medium system. Narrow and low profile, with good padding. Like all Flipside bags, this one opens on the back the side that sits closest to your body for extra security. In excellent condition. Interior dimensions are approximately 12x20x36cm without the removable zippered pouch, 12x20x32 with.