The VAT Rules Are Changing From 1 July 2021
  • English
  • Einstein Flash Unit E640

    Paul C. Buff Einstein Flash Unit E640

    Back to overview

    € 699,00

    The Einstein Flash Unit features action stopping flash durations, color consistency, and the broadest power range.

    Read the full product description

    • Article code: E640

    Direct checkout

    • In stock
    • In stock / 3 -5 days
    • The VAT Rules Are Changing From 1 July 2021

    Product description

    • 9 f-stop power variability (2.5 Ws to 640 Ws)
    • Adjustable in precise 1/10 f-stops
    • All-digital control from LCD display
    • Global plug-and-play from 95 to 265 VAC
    • Action stopping flash durations as short as 1/13,500 sec. (t.1) (1/54000s. (t.5)
    • Color consistency +/- 50K at any power
    • Bright, adjustable 250 W modeling lamp
    • Frosted dome cover reduces UV emission
    • Audible and visual recycle indicators
    • Compatible with all BUFF light modifiers, light stands, CyberSync™ remotes, and Vagabond™ systems
    • 2-Year Factory Warranty
    • For the shipping costs per country see our shipping & Returns page



    • 1x Einstein Flash Head E640
    • 1x Glass Dome Cover
    • 1x Protective cover Einstein Flash
    • 1x 250 Watt modeling lamp
    • 1x Flashtube for Einstein E640
    • 1x 3m (457,2 cm) sync cord (1/8" to PC)
    • 1x Down-angle 3m, 2-prong grounded power plug optionally
    • 1x Back-up SR5-F type 8A fuse
    • 1x Einstein owner's manual



    The Einstein™ Flash Unit features action stopping flash durations, color consistency, and the broadest power range. The flexibility of the power range allows for everything from over-powering the sun, to shooting indoor portraits with a wide-open aperture. 

    Perfect for: Professional photographers in any field.

    Sync Cord Compatibility: All Paul C. Buff, Inc. flash units arrive with a 15' sync cord for connecting to a camera's PC sync terminal. Not all camera's are equipped with a PC sync terminal. If you plan on using this cable, and not wireless remotes, you may need a hot shoe adapterCheck your camera's compatibility. 

    Find out how the Einstein compares to our other flash models.




    • Article code E640
    • Flash Unit Einstein™ Flash Unit
    • Wattseconds 640 Ws
    • Power Variability 9 f-stops (full to 1/256 power)
    • Recycle to Full 1.7 sec
    • Recycle to Half Power 1/2000 sec. (at full power)
    • Flash Duration (t.5) 1/2000 sec. (at full power)
    • Flash Duration (t.1) Action Mode : 1/588 sec. (at full power) | 1/13,500 sec. (at 1/256 power) / in Color Mode 1/588 sec. (at full power) | 1/8,000 sec. (at 1/256 power)
    • Power Requirements Automatic power switching from 95 to 265 VAC, 50/60 Hz (no lamp change or user attention required)
    • Average Current Draw Brief initial recycle surge current of 8.5A; average draw of 8A
    • Sync / Trigger Voltage Less than 5 volts (safe for use with DSLR cameras)
    • Modeling Lamp 250 W, 120VAC bayonet-style quartz bulb
    • Flashtube 12mm flashtube (daylight-balanced and UV-coated
    • Stand Mount Fits stands up to 5/8 in.
    • LCD Display Back-lit, high-resolution color LCD. 320x240 pixels; 2.4 in.
    • Umbrella Mount Accepts umbrella rods up to 9mm
    • Weight 4 lbs. 5 oz. / 1.81 Kg.
    • Dimensions 17.78cm (H) x 13.72cm (D) x 19.81cm (L)