The Vivitar Zoom Thyristor 285 Vari Power Flashcamer and 283 Flash are vintage cameras known for their high-quality performance and unique features. With a sleek black design and the ability to capture stunning images, these cameras are perfect for photography enthusiasts looking to explore the world of 35mm film cameras. Made in Japan, these cameras offer a level of craftsmanship and reliability that is hard to come by in today's digital age. Capture timeless moments with the Vivitar Zoom Thyristor 285 and 283 flash cameras. they were not tested because I don’t have a SB-4 power supply.