Vivitar Vivitar Zoom Thyristor SMS 40D Vintage Camera Flash Unit Black

Vivitar Zoom Thyristor SMS 40D electronic flash for film SLR cameras. Features a zoom/bounce head with rectangular reflector, thyristor auto exposure, and dedicated module compatibility (labeled for DM/C mount — Contax/Yashica system, but often works with adapters or in manual mode on other cameras). Includes power switch, zoom settings (45/65/90), test button, and ready light. Good pre-owned condition with visible wear, scuffs, and dust from age/use. Head tilts for bounce flash. Classic 1980s–1990s accessory for vintage photography. Ships fast from Ventura, CA.