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This is a vintage Vivitar Auto Thyristor 3700 electronic flash unit, a versatile accessory for a variety of film cameras with a standard hot shoe mount. The flash features an auto thyristor circuit, which allows for automatic flash exposure based on the subject's distance, simplifying flash photography. The head swivels for bounce flash, enabling softer, more flattering light. The built-in exposure calculator dial on the side provides a quick reference for manual settings. This is a great, affordable option for photographers and collectors looking for a functional vintage flash unit.
Technical Specifications:
Model: Vivitar 3700 Auto Thyristor
Guide Number (GN): 110 (at ISO 100, feet)
Power Source: 4 x AA batteries (not included)
Mount: Standard Hot Shoe
Features: Swivel head, auto and manual exposure modes
Weight: Approx. 370g (13.1 oz)
Condition Report: This flash unit is in very good working condition. It has been tested and fires correctly. The battery compartment is clean and free of corrosion. The swivel head locks securely into position. The plastic body shows some light cosmetic wear, including minor scuffs and marks, but no major damage. All dials and switches are fully functional.