Kirk BL-D700 brand_Tamron It's possible that it's some

It's possible that it's some kind of reference to the internet (the design is very early-2000s) but I don't know what this bag has to do with the internet other than the fact that you're reading this description

heavy portrait lens with a fast f1

The original Canon EOS 5D is no spring chicken

Use it for cameras

Kirk BL-D700 brand_Tamron It's possible that it's someThe Kirk BL D700 is a well made L bracket for the Nikon D700 camera. Machined out of solid aluminum, this bracket provides an Arca type fitting for both vertical and horizontal shooting, plus a bit of extra bonk protection just in case (can't hurt.) In excellent condition overall, with minor cosmetic finish wear.