The PENTAX AF160FC Auto Macro Ring Flash is uniquely suited for advanced close-up applications using the automatic exposure-control system of PENTAX digital SLR cameras. This unit offers smooth, even lighting for the closest subjects, while eliminating vignetting and subject shadow.
With a guide number of 16 at ISO 100/m, it provides ample lighting for small or large close focus subjects. The AF160FC's modeling light, with 4 white LED's, help preview flash exposure while assisting autofocus operation. Designed to offer uniform lighting on a subject to minimize shadows, the flash is ideal for close-up, portrait, product, dental and medical applications.