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Sigma 13940110 EF 500 DG ST SA-N Flash — main product image
Sigma

Sigma 13940110 EF 500 DG ST SA-N Flash

★★★★★5.0 (1 reviews)

Powerful bounce flash with guide number 165 and full TTL compatibility for Nikon SLR and DSLR cameras.

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Overview

The Sigma EF 500 DG ST SA-N is a dedicated shoe-mount flash designed to bring powerful, controllable lighting to Nikon-compatible SLR and DSLR systems. With a guide number of 165 feet (50 meters) at ISO 100 and 105mm, it delivers ample output for event coverage, portraiture, and general-purpose photography. The flash head offers a generous range of motion — tilting 90° upward and 7° downward while swiveling 180° left and 90° right — making it well-suited for bounce flash techniques off ceilings and walls to produce softer, more flattering light.

Focal length coverage spans 28mm to 105mm with automatic zoom adjustment, and a built-in wide-angle diffusion panel extends that range down to 17mm for ultra-wide shooting. On the Nikon platform, the flash supports 3-D multi-sensor balanced fill flash for accurate exposure metering in TTL mode. While the manual power control is limited to just full and 1/16 output levels — a notable constraint for photographers who rely on precise manual flash ratios — the auto power off feature and straightforward operation make it a practical, affordable lighting tool for photographers who primarily shoot in TTL mode.

Key Features

Maximum guide number of 165 in feet at 105mm focal length

Projection angle of flashlight set automatically

Fully automatic flash with TTL flash exposure control

97-degree vertical tilt, 270-degree horizontal swivel

Auto power off system

Specifications

Guide Number
165 ft / 50 m (ISO 100, at 105mm)
Focal Length Coverage
28mm to 105mm (17mm with wide panel)
Tilt Angle
90° upward, 7° downward
Swivel Angle
180° left, 90° right
Manual Output Levels
Full, 1/16
TTL Compatibility
S-TTL, Nikon 3-D Multi-Sensor Balanced Fill Flash, E-TTL, ADI, P-TTL
Features
Auto Power Off
Brand
Sigma
Model
13940110

Pros & Cons

👍 Pros

  • High guide number of 165 feet at ISO 100 provides strong light output for its class.
  • Full tilt and swivel head allows versatile bounce flash techniques in various shooting environments.
  • Built-in wide panel extends coverage to 17mm for ultra-wide-angle lenses.
  • Broad TTL compatibility across multiple camera systems including Nikon 3-D multi-sensor balanced fill flash.
  • Auto power off feature helps conserve battery life during long shoots.

👎 Cons

  • Manual flash output is limited to only full power and 1/16 — no intermediate levels for fine-tuning.
  • Does not include wireless slave or commander functionality for multi-flash setups.
  • No built-in AF assist beam for low-light autofocus support is a limitation compared to higher-end flashes.
  • Focal length coverage tops out at 105mm, which may not fully concentrate the beam for longer telephoto lenses.

Frequently Asked Questions

This flash is designed for Nikon cameras and supports 3-D multi-sensor balanced fill flash. It also offers TTL compatibility with Sigma, Canon, Minolta, and other systems depending on the variant.
Yes, the flash head tilts 90° upward and 7° downward, and swivels 180° to the left and 90° to the right, giving you flexible bounce lighting options.
It covers 28mm to 105mm natively, and with the built-in wide panel pulled out, it extends coverage down to 17mm.
Yes, but manual output is limited to two levels: full power and 1/16 power. There are no intermediate manual steps.
Yes, it includes an auto power off feature that conserves battery life when the flash is idle.

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