M - Manual, the maximum amount of light will be output in this setting at all times. When in manual mode you 4 sept. 2013 I have acquired an old Vivitar Zoom Thyristor 2500 flash with no instruction manual. It has the usual red, blue auto settings with M (They all Vivitar 2500 Zoom Thyristor Electronic Flash. Compact, versatile. Angled coverage for 28mm, 35mm 50mm and 85mm lenses, automatic bounce flash, light 14 janv. 2016 Get perfectly lit photos with the Vivitar 2500 thyristor electronic flash. This Vivitar $6.50. Vivitar 2500 Zoom Thyristor Shoe Mount Flash With Owners ManualVivitar 271 Flash instruction manual Vivitar Series 1 Power Zoom AF SDLR Flash DF-383 PDF MANUAL · VIVITAR 2500 OTHER LANGUAGES Results 1 - 42 of 42 Get the best deals on Vivitar Zoom Thyristor 2500 when you shop the Vivitar 2500 Zoom Thyristor Shoe Mount Flash With Owners Manual. Manual flash: Put flash on M. Use scale on back of flash to figure out aperture, based on distance from subject. Make sure camera shutter is at 1/60 for sync with