Create light on the go with your Pentax camera by using this shoe-mounted YN585EX Speedlite from Yongnuo which offers full P-TTL support, including rear curtain sync and red eye reduction. The flash offers a powerful guide number of 190' at ISO 100 and 105mm as well as a zoom head with coverage for lenses of 20-105mm. Also, it has a wide-angle diffusion panel that expands the beam to work with 14mm lenses. Along with these capabilities, the YN585EX can tilt from -7 to 90° and can rotate both left and right 180°. And, it can work as a wireless TTL slave when triggered by compatible master flashes.
Operation is made easy with a large LCD screen on the back and it runs on four AA batteries. It will recycle in just 3-5 seconds at full power and it features a multi-mode for firing a series of flashes at once. It has a PC port for wired sync as well as a USB port for firmware updates.