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Pentax AF540FGZ (MZ/PZ/SF/ZX/DSLR) Flash [GN177' AT 85mm] {Bounce, Swivel, Zoom}

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* Item pictured for illustrative purposes only, actual item not pictured.

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Pentax AF540FGZ (MZ/PZ/SF/ZX/DSLR) Flash [GN177' AT 85mm] {Bounce, Swivel, Zoom} Description


Pentax AF540FGZ Auto Flash

The PENTAX AF540FGZ auto flash unit features a large guide number of 54 (at ISO100/m). This clip-on, twist/tilt, auto-zoom flash provides a variety of advanced flash applications, including P-TTL auto flash, high-speed synchronization and wireless P-TTL auto flash, when mounted on a PENTAX digital SLR camera.

KEH Specifications

  • Mount: Shoe
  • Bounce Head: Yes
  • Swivel Head: Yes
  • Coverage: 23° - 60° 
  • Zoom Head: 24mm - 85mm
  • Recycle Time: ~ 4.5 - 6 seconds
  • Battery Type: Four AA batteries 
  • Dimensions: 3.0" x 5.6" x 4.2"
  • Weight: 13.4 oz


Power Description

Power Source Battery


Additional Information

Wireless Flash:

  • Control system: Optical pulse transmission
  • Wireless position: Master (M), control (C), slave (S)
  • Channels: 1 through 4
  • Compatible modes: P-TTL, auto (A), manual (M)

Battery Information

Number of Batteries Supported 16
Battery Model Supported FR6, LR6
Battery Size Supported AA

General information

Product Model AF540FGZ
Manufacturer Part Number 30425
Manufacture GTIN 0027075116269
Brand Name Pentax

Technical Information

Maximum Flash Recycle Time 6 Second
Minimum Synchronization Shutter Speed 1/1200
Maximum Synchronization Shutter Speed 1/20000
Guide Number 45 m/148 ft at ISO 100 (50 mm Zoom-head Setting), 54 m/177 ft at ISO 100 (85 mm Zoom-head Setting)
Autofocus Assist AF Assist Beam
Light Angle 85° Vertical (Flash), 98° Horizontal (Flash)
Flash Modes Automatic, Manual, P-TTL, TTL

Customer Reviews