[f. VIGNETTE sb. + -ER1.] A device for producing photographic vignettes, usually consisting of a mask or screen with a central hole or of graduated opacity from the center outwards.
1875. Knight, Dict. Mech., 2710/1. Vignetter..., the photographers instrument for giving a vignette appearance to a portrait or print, the edges fading away insensibly into the background.
1889. Anthonys Photogr. Bull., II. 23. A head rest, vignetter and other accessories.