Manufacturer’s Description
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.
The Specs
| General | |
|---|---|
| Weight | 13.40 oz - Without batteries |
| Dimensions | 5.60" Height x 3 Width x 4.20" Depth |
| URL | http://www.pentaximaging.com |
| Warranty Information | 1 Year Limited |
| Additional Specifications | |
| Frequency Band | 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) Effective range: Approx. 13ft (according to Pentax testing conditions) |
| Number of Batteries Support | 16 |
| Maximum Synchronization Shutter Speed | 1/20000 |
| Flash Synchronization | 1/1200 to 1/20000 |
| Maximum Flash Recycle Time | 6 Second |
| Battery Model Supported | FR6 |
| Minimum Synchronization Shutter Speed | 1/1200 |
| Mount Type | Shoe Mount |
| Autofocus Assist | AF Assist Beam |
| Product Model | AF540FGZ |
| Front Camera | Pentax |
| Brand Name | Pentax |
| Light Angle | 98 Horizontal (Flash) |
| Flash Range | 26.20 ft |
| Quick Glance | |
| Flash Mode | P-TTL|TTL|Automatic|Manual |
| Compatibility | |
| Flash Mode | P-TTL|TTL|Automatic|Manual |
| Performance | |
| 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) |
| Flash Recycle Time | 6 Second Approximate - Alkaline|6 Second Approximate - Nickel hydroxide (Ni-MH)|6 Second Approximate - Lithium |
| Battery Life | 200 Flash Approximate - Alkaline|250 Flash Approximate - Nickel hydroxide (Ni-MH)|350 Flash Approximate - Lithium |
| Flash Coverage | 20 mm to 85 mm |
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