Date: Mon, 21 Jun 1999 17:24:28 -0400 (EDT) From: [EMAIL PROTECTED] Peter - The specifications you quoted for a "high-speed flash" are quite pedestrian, and almost any modern series thyristor (automatic exposure control) strobe should do, or come close to doing your job. Unfortunately you didn't specify the area to be covered, and there is an implication that you may be using a macro setup, which might also alter the requirements due to lens magnification. However, your 40 microsecond duration may be achieved easily, since most of these strobes are capable of 20 to 15 microsecond minimum durations. Also, you will find that if you use this type of equipment, there is a difference between the thyristor controlled duration and that of a simple capacitor discharge circuit. The former has a shorter effective duration (this is a disparity caused by waveforms and definitions), so, if your duration is specified based upon a maximum image blur requirement, you will be able to use a longer measured duration, greater light output, and still achieve less blur when using the inexpensive, off the shelf thyristor strobe. Best luck, - Charlie Miller [EMAIL PROTECTED] [EMAIL PROTECTED]
