20% OFF Gear + FREE Rental Days!  Code: BF2017  See Details
20% OFF Gear + FREE Rental Days!  Code: BF2017  See Details
Browse the largest online selection of photo and video gear. Choose your period of rental, and we’ll send you what you need.
ship or pickup
Your order will arrive on the day you specify. You also have the option of picking up your order at one of our locations.
Shoot to your heart’s content with the highest quality professional equipment.
When your due date arrives, just use your prepaid label and the box your order came in to ship it back to us.
Important Things to Consider

• Your rental begins when the first delivery attempt is made. If you do not think you’ll be available for home delivery, please contact us to arrange for delivery to another location.

• Your rental must be returned to its pick up location or postmarked by your shipper before the same day cut-off time. Contact the location you’ll be bringing the return package to in advance to find out what the same day cut-off time is. Remember, local pickup spots and ship centers have varied hours!

• For your security, get a receipt from whoever you are dropping your gear off with for return.


Has there been an emergency? We understand. Please communicate your issue with us as soon as humanly possible so that we may properly address your needs with regards to your order. We are available by email, live chat, and by telephone during standard business hours.

Einstein 640W/s Flash

7 Days
Retail: $499.00
No Damage Waiver
You are liable for any damage or loss to the rental equipment.
GearGuard Damage Waiver
Protects you from liability due to unintentional damage, after paying a deductible.
Theft and water damage not covered.
Reserve Add to Cart
Reserved until : December 4 ?
CloseThe last reservation of this item will conclude on December 4. For rentals that require shipping or a pickup at a non-headquarter location, please select a later date for your arrival. Headquarter offices are the only locations that can accept a same-day reservation, as transit time is not calculated in this date.
  • Description
  • Notes
  • Rental Includes
  • Spec
  • Manual
  • Reviews
The Einstein 640W/s Flash is an exceptionally versatile unit with two modes: Constant Color and Action. Constant Color mode maintains a 5600ºK temperture regardless of power or voltage (the included frosted dome lowers the temperature by about 300ºK). This flash is voltage regulated for consistency. Get extreme action-stopping capabilities in Action Mode with a rapid sequence at relatively high power for high speed subjects like water, dancing, sports, and “overpowering” the sun. A large LCD screen makes changing flash settings easy the the spring-loaded claw-style mounting apparatus connects easily to the Paul C. Buff Rotating Speedring, which accepts a variety of rod-based modifiers (not included). At full power the recycling time is a longish 1.7 seconds but at reduced power that decreases to a wicked-fast 1/10th of a second. This flash is ideal for studio shooting and edgier, sporty outdoor shoots.
  • (1) 640W/s Flash with 250W Modeling Lamp
  • (1) Flash Cap
  • (1) Reflector
  • (1) AC Cable
  • • Frosted Dome
  • • 1/8-PC Sync Cable
  • • Carrying Case
  • • This flash does not include a speedring, however it does include a reflector that accepts standard 7” grids (grids not included but can be added for a fee upon checkout).
  • • This flash comes with a 1/8-PC sync cable only to fire the lights from your camera. Alternatively, you may rent a Pocket Wizard MC2 for the Einstein along with a regular Pocket Wizard for your camera’s hotshoe to fire the Einstein wirelessly. You may also rent 2 regular Pocket Wizards and connect one to the Einstein with a 1/8-1/8 sync cable.
  • • This flash does not come with a power or battery pack and must be plugged in with AC power to operate. It also does not come with a light stand.
  • • Max Power: 640W/s Flash
  • • Flash Duration: 1/588 Max - 1/13,500 Min at Half Power (Down to 1/8,000 at Full)
  • • Recycle Time at 100%: 1.7 Seconds
  • • Power Range: Approximately 2.5W/s to 540W/s in 1/10 Stop Increments
  • • Protective Reflector
  • • 250W Modeling Lamp
  • • Operating Voltage: 95-265V AC
  • • Built-In Slave Cell for Radio, Optical, and Sync Cable
  • • Fan-Cooled
  • • Weight: 4.5 lbs