• Guide Number 178 at ISO 100/ft (54 at ISO 100/m)
  • Auto-zoom flash with bounce- and swivel-head and flip-down wide-angle diffuser

This hot shoe mounted, bounce-and-swivel, auto-zoom flash provides a variety of advanced flash applications, including P-TTL auto flash, high-speed synchronization and wireless P-TTL auto flash with PENTAX digital SLR cameras.

Compatible with:
All PENTAX DSLR cameras

  • P-TTL mode with pre-flash allows for more accurate flash photography.

  • On-camera and wireless high speed flash sync is available in P-TTL modes.

  • Standard TTL flash is available when used with older PENTAX SLR bodies.

  • The LCD display shows the effective range of the flash in P-TTL, TTL and AUTO modes.

  • Includes an autofocus assist beam for focusing in low-light or low-contrast situations.

  • Wireless P-TTL flash is available when used with PENTAX DSLR cameras that support wireless flash operation.

  • Manage flash exposure compensation through a simple control dial.

  • Auto and Manual modes allow for use with non-TTL PENTAX camera bodies.

  • Modeling-light feature strobes the flash for one second, so the photographer can check for unwanted shadows or highlights.


Clip-on, P-TTL auto zoom flash

Flash Modes

P-TTL auto, TTL auto, auto, manual

Bounce Head

Yes, (-10º, 0º, 30º, 45º, 60º, 75º, 90º)

Zoom Head

24-85mm (20mm w/ wide angle diffusor, flash senses focal length automatically)

Focal Length

24-85mm (20mm w/ wide angle diffusor)

Flash Range

2.6' – 26.3' (GN 54, ISO 100, F5.6)

Color Temp


Other Functions

Auto Power Off, Test Discharge, 1s modeling flash, P-TTL wireless flash, wide angle diffusor, catchlight panel, autofocus spotbeam


3.0" x 5.6" x 4.2"


TR Power Pack 3 (optional) available as an external power source for the AF500FGZ flash.

Flash Control

TTL-series-control auto flash, manual flash

Flash Exposure Compensation

In P-TTL mode, -3.0 to +1.0 steps (0.5-steps increments)

Swivel Head

Right: (0º, 30º, 60º, 90º, 120º, 150º, 180º)
Left: (0º, 30º, 60º, 90º, 135º)

Discharge Angles

31-78 degrees horizontal, 23-60 degrees vertical (98 degrees horizontal, 85 degrees vertical with wide angle diffusor)

Guide Number

178.2 at ISO 100/ft (54 at ISO 100/m)

Interval Battery Life

Alkaline batteries - approx 6s interval, 200 full discharges

Lithium batteries - approx 6s interval, 350 full discharges

NiMH batteries - approx 6s interval, 250 full discharges

TR Power Pack 3 - approx 4.5s interval, 700 full discharges

Sync Modes

Leading curtain sync, Trailing curtain sync, Contrast control sync, High-speed sync

Power Supply

Four AA size batteries (alkaline, lithium, NiMh), TR Power Pack 3 available (optional)

Weight W/o Batteries

13.04 oz.


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