Canon Battery Grip BG-E3 for Canon EOS 30D DSLR Camera
This large capacity Battery Grip BG-ED3 was specifically designed concurrently with the EOS D30 to double the shooting capacity and to improve camera handling when using the vertical format. It holds two BP-511 battery packs in parallel, and takes about 1,080 images when fully charged (twice as many as when the EOS D30 is used alone (Table 1). As shown in Figure 2, it has a shutter release button for taking vertical shots, a main electronic dial, an AE lock/FE lock button, and an AF point selection button, making vertical shooting as easy as horizontal shooting. It measures 145.9 x 109.2 x 72.2mm and weighs 320g (main body only).