Eureka! Many thanks to my Optimal family It's been confirmed that the accuating motor that drops the mirror down upon shutter release, is not working New parts? Maybe, or replacement. Hopefully, they can't find any parts....LOL D. Denice Barsness, CRA, COMT, ROUB, CDOS, FOPS Ophthalmic Diagnostic Center CPMC Department of Ophthalmology 2100 Webster Street Suite 212 San Francisco CA 94115 (415) 600-3937 FAX (415) 600-6563