Designed for use with a gripped dslr with 70 200mm f28 with lens hood in shooting position the think tank digital holster 50 v20 is a unique holster bag with several great features for the photographer on the move the pop down feature increases the height of the bag to allow a lens hood or telephoto lens to fit into it thereby enhancing its versatility it has a rail attachment for optional components a stretchable front accessory pocket and rotate or lock technology for use with belts