The think tank digital holster 20 v20 has been designed specifically for standard size dslrs with 24 70 f28 with hood in shooting position or 70 200mm f28 with hood reversed integrated into the design is a unique pop down feature which increases the height and therefore the versatility of the bag and creates space for a lens hood or telephoto lens this holster attaches to all think tank belts and bags with modular rail systems and includes a stretchable front pocket for small access