Submitted by György Chityil ... on Fri, 01/19/2018 - 17:04 Hierarchy: VerbDescription: {{optics|photography}} To reduce lens aperture using an optical diaphragm.Ngram: diaphragmNgram Text: diaphragmSource: WiktionaryIssue: 0Wiktionary tag: opticsphotographyNgram Count: 1Wikokit WikiText ID: 524111