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Pentax AF 540F GZ II Flash

Pentax AF 540F GZ II Flash

Pentax AF 540F GZ II Flash
Barcode/EAN: 27075233010
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With a maximum guide number of 54 (at ISO100/m), this high-capacity, clip-on auto flash features a dustproof, weather-resistant structure to deliver dependable performance even under demanding outdoor conditions, such as at dusty locations and in the rain. Since it features a powerful white-LED flash head and an AF-assist light for shooting in the dark, it can be used not only for close-range movie recording, but also for still-image shooting with extended exposures. It provides nine custom functions to personalize its operation, including on/off switching of the LED light when used as a catch light, and setting of the LED light’s discharge mode in still-image shooting.

This auto flash features a dustproof, weather-resistant structure identical to that of the camera body, with 28 sealing parts applied across the unit, including the hot shoe. Its power switch, control dials and buttons, and battery compartment are all completely sealed to provide an airtight structure. It even has a tightening knob to eliminate gaps between its hot shoe and the camera’s contacts. A light twist of this knob assures solid connection of the electrical contacts, while preventing the intrusion of foreign substances.

Flash Specifications (for APS-C-format SLR cameras)
P-TTL Auto Available
auto flash
Manual guide number
[ISO100 • m] 21(13mm) , 32(16mm) , 35(19mm) , 39(24mm) , 45(34mm) , 50(48mm) , 54(58mm)
Manual guide number
[ISO200 • m] 30(13mm) , 45(16mm) , 49(19mm) , 55(24mm) , 64(34mm) , 71(48mm) , 76(58mm)
Discharge angle Discharge angle adjustable at six settings with automatic or manual zooming of flash head
Angle-of-view coverage of 16mm, 19mm, 24mm, 34mm, 48mm and 58mm
Wide-angle panel
(built-in) Available
Angle-of-view coverage of a 13mm lens
Bounce flash Up(~90°) , Down(~10°) , Left(~135°) , Left(~180°)
Discharge level
compensation -4.0EV ~ +2.0EV (in 1/3EV or 1/2EV steps) *
AF-assist light Available **
Size and weight
(approx.) 76mm(W) x 113mm(H) x 108mm(D)
350g (flash body only)
Power source Four AA-cell batteries
Other functions • Exclusive use with digital SLR cameras
• Dustproof, weather-resistant structure
• Automatic camera-format switching
• Customization with nine custom functions
• Wireless sync mode
• High-speed sync mode