Sigma SD1 Merrill Professional DSLR Camera
The Sigma SD1 Merrill is a 15.4 MP APS-C DSLR camera — known for its Foveon X3 APS-C Sensor and Dual TRUE II Processor. Check GearFocus for current availability, with buyer protection on every purchase.

Sigma SD1 Merrill Professional DSLR Camera
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Overview — Sigma SD1 Merrill
Key Features — Sigma SD1 Merrill
Foveon X3 APS-C Sensor: The 15.4MP Foveon X3 direct image sensor captures full color data at every pixel location, unlike conventional Bayer-pattern sensors, resulting in exceptional detail and color accuracy.
Dual TRUE II Processor: Twin TRUE II image processors handle the substantial data output of the Foveon sensor, enabling 5fps burst shooting and efficient RAW file processing.
Weather-Sealed Magnesium Alloy Body: Dust and moisture resistance combined with a rigid magnesium alloy construction makes the SD1 Merrill suitable for professional use in challenging outdoor conditions.
Sigma SA Lens Mount: Native compatibility with Sigma's SA-mount lens lineup gives photographers access to a range of Sigma prime and zoom optics purpose-built for this system.
Optical Pentaprism Viewfinder: Provides 98% frame coverage for a bright, accurate view of the scene during composition and shooting.
11-Point Phase-Detection AF: Phase-detection autofocus across 11 points enables reliable subject acquisition for stills shooting in a range of situations.
Specifications — Sigma SD1 Merrill
| Spec | Detail |
|---|---|
| Use Cases | Studio |
| Type | DSLR |
| Sensor | APS-C |
| Resolution | 15.4 MP |
| Processor | Dual TRUE II |
| ISO Range | 100 – 6400 |
| AF System | Phase Detection |
| AF Points | 11 points |
| Max Photo Resolution | 4806 x 3204 |
| Burst Rate | 5 fps |
| Image Stabilization | None |
| Display | 3.0 inches TFT LCD |
Description — Sigma SD1 Merrill
The Sigma SD1 Merrill is a professional-grade DSLR designed for serious still photography. At its core sits an APS-C sensor rated at 15.4 MP, processed by a Dual TRUE II engine. The camera's ISO range of 100–6400 provides flexibility across lighting conditions.
Autofocus uses an 11-point phase-detection system, and burst shooting reaches 5 fps. The optical pentaprism viewfinder delivers 98% frame coverage at a 60Hz refresh rate, while the 3.0-inch TFT LCD rear screen resolves 460,000 dots. The body is constructed from magnesium alloy, measures 145.5 x 113.5 x 80.0 mm, weighs 700g, and carries a weather-sealed rating.
It accepts Sigma SA-mount lenses and stores images on CompactFlash cards. Connectivity includes USB, and the hot shoe follows the standard ISO specification with a manual flash system. The Li-ion BP-21 battery is rated for approximately 450 shots.
No image stabilization is present in the body.
Pros — Sigma SD1 Merrill
- ✓Weather-sealed magnesium alloy body (145.5 x 113.5 x 80.0 mm) built for demanding conditions
- ✓15.4 MP APS-C sensor with Dual TRUE II image processing
- ✓Optical pentaprism viewfinder with 98% coverage and 60Hz refresh rate
Cons — Sigma SD1 Merrill
- ✗No video recording specifications — this camera appears to lack meaningful video capability
- ✗No in-body or digital image stabilization of any kind
- ✗No Wi-Fi or Bluetooth connectivity
