Nikon Nikkor 20mm f/3.5 AI-s Lens (Nikon F Mount) but is only visible when

but is only visible when shining a strong light source through the lens

There is very light separation on the edge of one of the rear groups

The lens' exterior has few scratches and scuffs

it is a C-41 film

Nikon Nikkor 20mm f/3.5 AI-s Lens (Nikon F Mount) but is only visible whenGeneral Specifications: Manufacturer: Nikon Lens Mount: Nikon F (Pre AI, AI, AI s) Focal Length: 20mm Max., Min. Aperture: f 3. 5, f 22 Filter Thread: 52mm Focus Type: Autofocus (Screw Drive), Manual Overall Condition Good (M1 O2 C2) Mechanical: The aperture ring and focusing helicoid both rotate smoothly. Optical: The lens is mostly optically clear, with a small amount of dust, and no fungus, haze or separation. Cosmetic: This exterior of the lens is