Lighting maker Paul C. Buff has started a pre-order list for the innovative Einstein 640. The 640ws monolight - the company's most ambitious and full featured studio flash to date - is expected to ship at the end of January 2010 for US$439.95. Pre-ordering is open to residents of the United States, Canada and Puerto Rico. It's possible to pre-order the US$29.95 CSXCV transceiver module for the Einstein as well. *UPDATED*

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