Tamrac's Digital Zoom 4 was designed for digital SLRs (such as Canon's 30D) with a lens attached up to 4¼". Dual Foam Technology™ provides protection and a custom fit to digital cameras. The front pocket features Tamrac's patented Memory & Battery Management System™, which uses red flags to identify fresh memory cards and batteries from ones that are used up. An additional Windowpane-Mesh™ pocket organizes other small accessories. A smooth nylon pocket in the lid holds lens-cleaning paper. Two zippered side pockets hold additional accessories such as a mobile phone, PC card or compact card reader. Belt loops, an EasyGrip™ carrying handle, and shoulder strap provide convenient carrying options. Add Tamrac accessories to the Strap Accessory System™ (S.A.S.™) attachment slots to customize this zoom pack.