Photography. a device for blurring the edges of a photographic image so as to fade them into a plain surrounding area.
Origin of vignetter
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for vignetter
Historical Examples of vignetter
A vignetter for the purpose, as shown in Fig. 60, has been placed on the market.
The sketch shows the arrangement of vignetter inside camera.