Sigma Art 24-35mm f2 DG for Canon EF  type_Camera Bags so this might not be

so this might not be the right lens for you if you’re precious about cosmetic condition

The B+W NL2 is a high quality +2 diopter attachment for lenses with a 49mm front filter thread

The Nikon D3100 is a compact DSLR camera that shoots 1080p/24 video or 14mp stills

but I assume that it's some kind of SEO thing

Sigma Art 24-35mm f2 DG for Canon EF &nbsptype_Camera Bags so this might not beThe Sigma Art 24 35mm f2 DG lens is a fast, full frame wide angle zoom lens for Canon EF cameras. In very good cosmetic condition, with light wear from normal use and handling; most notably, the "24" legend on the zoom ring has worn partly off. Optics are clean, with minor dust. Function is excellent. Includes hood, case, and original box.