Reviews, reviews, reviews...

Pentax AF-540 FGZ
7.1 out of 10

Pentax AF-540 FGZ

Guide Number 178 at ISO 100/ft (54 at ISO 100/m) Auto-zoom Read more

Best Price at Amazon


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.
Release Date
First seen
28 December 2006