Nikon D40 reader The Neewer LB-A7 is an

The Neewer LB-A7 is an L-bracket for the Sony A7 digital camera

It’s got an aperture ring

The Calumet Roll Holder C2 is a rollfilm back for 4x5 cameras designed to slip in front of the groundglass like a sheet film holder- unlike most rollfilm backs that require partial disassembly

Focusing and diaphragm operation are excellent

There's easily enough room for a pro camera and a big f2

Nikon D40 reader The Neewer LB-A7 is anThe Nikon D40 is a compact 6mp DX format DSLR compatible with Nikon F mount lenses. Yes, it's an older camera; no, it doesn't do video. But if you're looking for a solid basic DSLR, this D40 might just do the trick. It's in excellent condition, with battery, charger, and strap.