SLR Magic Variable ND Filter 0.4-1.8 Mark II (77mm) brand_Metz with very light front element

with very light front element cleaning marks which won't affect imaging

That's right: both eyes open

The lens is clean and works well

Sekonic Leader L-VI selenium light meter in excellent cosmetic condition

The design is striking

SLR Magic Variable ND Filter 0.4-1.8 Mark II (77mm) brand_Metz with very light front elementThis SLR Magic Variable ND Filter Mark II is specially designed to minimize the weird uneven vignetting that sometimes afflicts variable filters. How? Using "special glass and treatment." Not sure what that means, but it seems to do a pretty good job. ND range is from 0. 4 to 1. 8 (just over 1 stop to about 6). A bit bulky it's thick, and the outer thread is 86mm but this filter includes its own lens cap to make up for at least the last bit of that.