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.
|Guide No.||177.17' (54 m) ISO100|
|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|
|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|
|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|