Lowepro lens case No2 a 70-300mm lens should fit this bag no problem. Virtually new as I never used it. Clean unmarked condition and all zippers work properly. There is also a Velcro strap on the back of the bag I think for use with a utility belt. Internal dimensions are approx 3.5 in or 9cm width and a depth of 8 inch or 21cm. There are also 2 canvas tabs at top of case. I don’t think it ever been designed to use with a shoulder strap though. I do not have a strap for this bag either. Re advertised due buyer returning case as did not fit his camera bag.