AF540FGZ Flash
Featuring a large guide number of 54 (at ISO100/m), the AF540 FGZ auto zoom flash offers 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.
- P-TTL mode with pre-flash allows for more accurate flash photography.
- Wireless P-TTL flash is available when used with PENTAX DSLR cameras that support wireless flash operation.
- On-camera and wireless high-speed flash sync is available in P-TTL modes.
- Flash exposure compensation is easy through a simple control dial.
- Bounce flash function, with adjustable angles of –10 to 90 degrees vertically and up to 180 degrees horizontally.
- Includes an autofocus assist beam for focusing in low light or low contrast situations.
- Auto and Manual modes allow for use with non-TTL PENTAX camera bodies.
- LCD display shows the effective range of the flash in P-TTL, TTL and AUTO modes.
- Modeling light feature strobes the flash for one second, so the photographer can check for unwanted shadows or highlights.
- Includes an autofocus assist beam for focusing in low-light or low-contrast situations.
- External power supply with the optional TR Power Pack-3
AF540FGZ Flash Features
AF540FGZ Flash Specifications
| Type | Clip-on, P-TTL auto zoom flash |
| Guide Number | 54 (at ISO100/m). Manual setting at 7 levels: Full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64 |
| Flash Control | TTL-series-control auto flash, manual flash |
| Flash Modes | P-TTL (TTL corrective auto flash, contrast-control auto flash),TTL (TTL auto flash), A (programmed auto flash),M (manual flash), SB (spotbeam emission only) |
| Flash exposure compensation | In P-TTL mode, -3.0 to +1.0 steps (0.5-steps increments) |
| Discharge Angles | 31-78º horizontal, 23-60º vertical (98º horizontal, 85º vertical with wide angle diffusor) |
| Bounce Flash | Yes, (-10º, 0º, 30º, 45º, 60º, 75º, 90º) |
| Swivel Head | Right: (0º, 30º, 60º, 90º, 120º, 150º, 180º) Left: (0º, 30º, 60º, 90º, 135º) |
| Zoom Head | 24-85mm (20mm w/ wide angle diffusor, flash senses focal length automatically) |
| Focal Length Coverage | 24-85mm (20mm w/ wide angle diffusor) |
| Flash Range | Approx. 0.8m - 8.0m (at G.N.45, ISO100, F5.6) |
| Interval & Battery Life/td> | 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 |
| Colour Temp. Balance | Daylight |
| Sync Modes | Leading curtain sync, Trailing curtain sync, Contrast control sync, High-speed sync |
| Other Functions | Auto Power Off, Test Discharge, 1s modeling flash, P-TTL wireless flash, wide angle diffusor, catchlight panel, autofocus spotbeam |
| Power Supply | Four AA size batteries (alkaline, lithium, NiMh) TR Power Pack -3 available (optional) |
| Dimensions | 76 x 142 x 107 mm (W X H X D) |
| Weight | 380g (without batteries) |
Model No. 30425