Back in January, lighting maker Paul C. Buff began to ship a revised version of the Einstein 640 that addressed a flaw in the monolight's accessory mount, one which resulted in some softboxes and other modifiers not being held securely. We've been using a set of Einstein 640s with the new mount for about two months, and can report that the beefier mount mechanism and reshaped mounting fingers do the job: the Einstein 640 now holds on tight to any speedring or reflector we've put on, including two that were prone to falling off previously.

More...