The 1531 is more economical to buy. On the other hand, the 1538 gives you six times the maximum flash rate of the former, and portable operation is possible with a rechargeable battery. The 1538-A can also supports an optional extension lamp.
The 1531-P2 Flash Delay is a valueable asset to any stroboscopic or high-speed photographic application. The 1531-P2 flash delay synchronizes the strobe with rapidly moving objects and controls the flash, relative to the position of the object, by introducing a variable time delay in the electrical path between the trigger source and the strobe. |