Nikon K Ring Set brand_Billingham but there's a lot of

but there's a lot of optics so that's not a big surprise

It provides 1:1 magnification without the use of extension tubes

not to mention rugged construction and handsome crinkle coat finish

If you're not terrified of filling your car with an ocean of glass crumbs

All screens are in excellent optical condition

Nikon K Ring Set brand_Billingham but there's a lot ofThe Nikon K ring set is a stack of tubes and adapters that gives you the opportunity for all sorts of F mount shenanigans. The set includes the K1, which is a short F to F extension tube; the K2, with a lens side F mount and an inner 52mm thread; the K3, with a 52mm outer thread on one end and a camera side F mount on the other; and two 52mm threaded extension tubes. In its simplest form, it's an adjustable extension tube, but there are enough odd