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Pentax AF540FGZ II Flash for Pentax DSLR Cameras

B&H # PEAF540FGZ2 Mfr # 30456
In Stock
Free Expedited Shipping
You Pay: $519.95
Product Highlights
  • Wireless Functionality with 4 Channels
  • Full Manual and P-TTL Exposure Control
  • Guide Number: 177' at ISO 100
  • Effective Range: 2.6-26.2' at f/5.6
  • Weather-Resistant Construction
  • Rotates 315° & Tilts +90 to -10°
  • Recycle Time: 3-5 seconds
  • Creative Control Modes
  • LED Continuous Light
  • AF-Assist Beam

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.

Creative control modes include first-curtain sync, second-curtain sync, high-speed sync, and contrast control
Rotates from 180° right to 135° left with a lock at 0° and click stops
Right: 180°, 150°, 120°, 90°, 60°, and 30°
Left: 135°, 90°, 60°, and 30°
Tilts from +90° to -10° with stops at +90°, +75°, +60°, 45°, 30°, 0°, and -10°
Recycle time: NiMH/3 sec - Alkaline & Lithium/5 sec
Flash head automatically controls zoom from 24mm-85mm (full-frame) with compatible cameras and autofocus lenses
Wide-angle panel pulls out of flash head to expand coverage to a 20mm angle of view in full-frame format
Multi-flash mode for up to 100 flashes
AF-assist beam for focusing under low light or low-contrast conditions
Daylight balanced flash for use outside without the need for gels or filters
Auto power off after 3 minutes of non-operation or after 1 hour while in wireless mode
LCD panel is backlit for use in poor lighting conditions
Runs on 4 alkaline, lithium, or Ni-MH AA batteries
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
Pentax AF540FGZ II Flash for Pentax DSLR Cameras
  • O-AC141 Case
  • Flash Stand
  • Limited 1-Year Warranty

    by PowerReviews
    AF540FGZ II Flash for Pentax DSLR Cameras

    (based on 2 reviews)

    Ratings Distribution

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    Reviewed by 2 customers

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    I want to buy one more...

    By Gastao

    from Brasil, SP

    About Me Pro Photographer

    Verified Buyer


    • Consistent Output
    • Easy To Use
    • Fast Recycling
    • Lightweight


      Best Uses

      • General Use

      Comments about AF540FGZ II Flash for Pentax DSLR Cameras:

      Well constructed, smaller than old 540, more efficient and fast... I was waiting long time for Pentax introducing new devices. Finally, the day is in!

      • Was this a gift?:
      • No

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      (1 of 3 customers found this review helpful)



      By Jay

      from Las Vegas

      Comments about AF540FGZ II Flash for Pentax DSLR Cameras:

      Easy to use, and I love that it's weather resistant.

      Share this review

      Batteries & Power

      Show more >

      Required item: Batteries are not included, and are required to power your flash.

      Varta -  High-Energy 1.5 V AA E91 Alkaline Battery - 4 Pk
      • You Pay: $1.23
      Watson -  4-Hour Rapid Charger with 4 AA NiMH Rechargeable Batteries (2300mAh)
      • You Pay: $17.95

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      Vello -  Light Bouncer Kit for Portable Flashes
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      Vello -  5" Snoot/Reflector for Portable Flash
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      Flash Mounting

      Vello -  Compact Shoe Stand for Universal Shoe Mount Accessories
      • You Pay: $7.95

      Sync Cords & Flash Remotes

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      Pentax -  F5P 3' Extension Cord for Off-Camera TTL Flash with Pentax Cameras
      • You Pay: $44.95
      Pentax -  F5PL Extension Cord (9.5')
      • You Pay: $84.00

      Plug Adapters

      OP/TECH USA -  RAINSLEEVE- FLASH (Pack of 2)
      • You Pay: $8.25
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