The Pentax AF540FGZ II Flash is an on-camera flash that is compatible with Pentax DSLR cameras. The AF540FGZ II has a guide number of 177' at ISO 100 and an effective range of 2.6 to 26.2'. Additionally, it features an all weather construction with 28 seals that pairs with Pentax weather-resistant cameras for safe operation in all conditions.
This flash features wireless functionality with access to 4 channels. It utilizes an optical pulse to transmit information and for triggering additional flash units up to 13.1' away. The AF540FGZ II can be set as a master, control, or slave unit and is able to use both manual and P-TTL while in wireless mode.
Full manual and automatic P-TTL controls are available on this flash. Full manual mode features nine steps of adjustment from full 1/1 power to 1/256 power. While in P-TTL mode, flash output compensation can be applied from -4 to +2 stops in either 1/3 or 1/2-step increments.
Additional creative control modes allow for specific effects to be created using the flash. For example, high-speed sync allows you to use faster shutter speeds than the camera's rated flash sync speed. Also, the LED light can be used as a continuous light source for video and long exposures.
Included with the AF540FGZ II are the O-AC141 Case for storage and a stand for setting up the flash off-camera.
Mount | Shoe |
Guide No. | 177.17' (54 m) ISO100 |
Exposure Control | Manual/TTL |
Angle of Coverage | 31° - 78° Horizontal Wide-Angle Adapter: 98° Horizontal 23° - 60° Vertical Wide-Angle Adapter: 85° Vertical |
Vari-Power | 1/1 - 1/256 |
TTL Dedication | Yes |
Bounce Head | Yes, +90° to -10° |
Swivel Head | Yes, 315° |
Coverage | 24 mm - 85 mm (Full frame) |
Distance Range | 2.62 to 26.25' (0.8 to 8.0 m) at f/5.6 |
Zoom Head | Full frame: 24 mm - 85 mm |
Recycle Time | Approximately 3 - 5 seconds |
Flash Duration | 1/1200 - 1/20000 sec |
Flash-ready Indicator | Yes |
Compensation | -4 EV to +2 EV (in 1/3 and 1/2 EV steps) |
Wireless Transmission | Method: Optical pulse Distance: Up to 13.12' / 4.0 m |
Wireless Communication Channels | 4 Channels |
Power Source | 4x AA Alkaline, Lithium, Rechargeable Ni-MH Batteries |
Dimensions (WxHxD) | 3.0 x 4.4 x 4.3" / 76.0 x 113.0 x 108.0 mm |
Weight | 12.35 oz / 350 g |
Reviews Pentax AF540FGZ II Flash for Pentax DSLR Cameras