Nikon MB-D15 slide tray The back can be rotated

The back can be rotated 90 degrees to shoot in portrait or horizontal format

though no guarantees

or if you're looking for a softer look with some colour fringing (it's a little bit Holga)

Includes original leather case (for on-land use)

it's big and heavy (a bit over a kilo) and you can't attach filters- but it's a heck of a lens if you need the sort of wide-angle perspective it can produce

Nikon MB-D15 slide tray The back can be rotatedThe Nikon MB D15 is a vertical grip and battery holder for the Nikon D7100. It accommodates either an extra EN EL15 battery or 6 AA batteries with the included trays (the batteries are sold separately). In excellent condition.