Used Vivitar Auto Thyristor 225 | Flash | U7

The Vivitar Auto Thyristor 225 is a compact vintage electronic flash designed for photographers who want automatic flash exposure without carrying a large professional Speedlight. Its two automatic exposure ranges provide either greater depth of field or increased working distance, while manual operation gives the photographer additional control. The built-in thyristor circuitry shuts the flash down when enough light has reached the sensor, conserving battery power and allowing relatively fast recycling. With a GN 66 at ISO 100, the 225 provides useful output for general 35mm film photography while remaining exceptionally small and lightweight. Its approximately 5500K daylight color balance, hot shoe, and PC-sync connection make it compatible with a wide range of classic film cameras. For vintage-film shooters, the 225 is a simple, lightweight flash that pairs particularly well with cameras from the same era.