Paul C. Buff Einstein E640 - Detailed Performance Specifications; Flash Variability and Accuracy; Recycle Time and Indicators; Modeling Lamp Specifications

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Flash Variability
(informal term)
9 f-stops in precise 1/10f digital steps (Full to 1/256 power);
voltage and IGBT time regulated to <1%; accuracy is +/-
1/10f from Full to 1/128 power, +/- 2/10f at 1/256 power
Recycle
1/10 to 1.7 second recycle at 120 or 240 Vac (may be red
before 100% recycle for speed shooting at reduced power);
switchable audible and visual recycle ready indicators
Modeling Lamp
250 Watt, 120 Vac bayonet-style quartz lamp supplied (no
lamp change needed when operating from 120 or 240 Vac);
proprietary voltage regulation for constant lumen output
over entire input voltage range (lamp cannot reach full
brightness at AC voltages below 115 Vac); model lumens
track ashpower typically within +/- 1/10f over entire range
Flash Duration
1/2000 second t.5 at Full Power; t.1 duration varies from
1/588 to 1/13500 second in Action Mode and 1/588 to
1/8000 second in Constant Color Mode (see page 12 for more)
Color Temperature
5600º K +/- 50º K over entire range in Constant Color Mode;
5600º K to 6300º K in Action Mode (see page 12 for more)
Slave Tripper
ash-sensitive slave tripper (enabled or disabled via menu)
Reector / Accessory Mount
quick-release levers on both sides securely hold standard
Paul C. Buff™ / Balcar accessories and allow rotation with
improved gripping and ease of operation
Umbrella Mount
top-mounted umbrella tube and clamp mounts umbrella
shafts up to 9mm (0.350”) diameter
Light Stand Mount
reversible swivel mount with ratchet handle; mounts on light
stands with top couplers from 1/2” to 5/8”
Thermostatic Fan Cooling
high-velocity fan and ample cooling path directs air through
the electronics and past the lamp and tube for high volume
shooting; multiple overheat and overvoltage sensors
LCD Display
backlit, high-res 2.4” color LCD display (320 x 240 pixels)
Camera Sync
1/8” (3.5mm) jack; or res from optional CSXCV Transceiver
/ Cyber Commander™ remote or third-party radio triggers
**The sync circuit is galvanically isolated from the AC line, high
volage circuitry and the control power supply, making it nearly
impossible to damage a camera even if the ash unit fails.**