Compare Pentax AF-540 FGZ TTL Flash to Sunpak PZ-040N2 Flash

The AF540FGZ Electronic-Flash unit features a large guide number of 54 (at ISO 100) and provides a variety of advanced flash applications, including advanced P-TTL auto flash, high-speed synchronisation and wireless P-TTL auto flash (when mounted on a Pentax SLR camera). When mounted on a Pentax Auto-focus SLR (after the Z-10 and including Digital Format models) equipped with an FA-, FA J-, DFA- or DA- series lens, the AF540FGZ automatically adjusts its angle of discharge to the lens' focal length. The AF540FGZ auto-flash unit also features a newly provided 'Digital' position on the focal-length conversion scale of the Zoom Head which can accommodate digital SLRs, Bounce Flash function with adjustable angles of -10 to 90 degrees vertically and up to 180 degrees horizontally, and Power-zoom flash head to cover angles of view for 24mm to 85mm lenses (in 35mm format). Less

Shoe-mount electronic flash for Nikon TTL D-TTL and i-TTL cameras. Large full-info backlit LCD display for controlling and monitoring settings. Power zoom-bounce flash head covers 35mm focal lengths (from 24mm to 80mm). ISO guide number ranges from 60 at the 24mm zoom-head setting to 120 at 80mm. Auto-focus assist. Auto power-off. Less