Drop an X3F RAW file from your Sigma SD1 Merrill to check the shutter count — processed entirely in your browser, never uploaded anywhere. The SD1 Merrill is Sigma’s interchangeable-lens DSLR featuring the symmetric Foveon X3 Merrill sensor — all three colour layers at full 15.3 MP resolution, yielding approximately 46 MP of equivalent colour detail from its SA-mount body.
Check Shutter Count →The Sigma SD1 Merrill (2012) is the definitive expression of the Foveon X3 Merrill generation in a full DSLR body. Originally launched as the SD1 in 2011 at a controversial $6,900 price, the camera was renamed the SD1 Merrill in 2012 — honouring Foveon co-founder Richard Merrill — and the price was simultaneously reduced to approximately $2,299. The hardware is identical between the SD1 and SD1 Merrill. As a DSLR-class body, the SD1 Merrill uses a more robust shutter mechanism than the dp compact series. Sigma does not publish an official rating.
| Model | Release | Sensor | Mount | Est. Shutter Life |
|---|---|---|---|---|
| Sigma SD1 Merrill | 2012 | Foveon X3 Merrill (symmetric, APS-C) | SA | ~150,000 (est.) |
| Sigma SD Quattro | 2016 | Foveon X3 Quattro (asymmetric, APS-C) | SA | ~100,000 (est.) |
| Sigma SD Quattro H | 2017 | Foveon X3 Quattro H (APS-H) | SA | ~100,000 (est.) |
| Sigma dp2 Merrill (compact) | 2012 | Foveon X3 Merrill (symmetric) | Fixed 30mm f/2.8 | ~100,000 (est.) |
| Actuation Count | % of Est. Life | Assessment |
|---|---|---|
| 0 – 5,000 | 0 – 3 % | Very low use — near new |
| 5,000 – 30,000 | 3 – 20 % | Low to moderate use |
| 30,000 – 80,000 | 20 – 55 % | Moderate use — normal for active use |
| 80,000 – 120,000 | 55 – 80 % | High use — negotiate price |
| 120,000 + | 80 %+ | Near or past estimated life |
Given the SD1 Merrill’s slow write speed (up to 20 seconds per X3F file) and high original price, many examples in circulation have accumulated relatively few actuations despite being over a decade old. Verify shutter count alongside sensor cleanliness (dust on Foveon sensors can be difficult to address), focus accuracy, and overall body condition.
| Specification | Value |
|---|---|
| Sensor | Foveon X3 Merrill APS-C, 23.5 × 15.7 mm |
| Resolution (per layer) | 15.3 MP (4,800 × 3,200) |
| Effective resolution | ~46 MP equivalent (3 full layers) |
| RAW format | X3F |
| Lens mount | Sigma SA |
| Shutter speeds | 30 s – 1/4000 s; Bulb |
| Flash sync | 1/180 s |
| Continuous shooting | ~3 fps (limited by X3F write speed) |
| ISO range | 100 – 6400 |
| Video | None |
| Viewfinder | Optical pentaprism, ~98 % coverage, 0.95× |
| LCD | 3-inch, 460,000 dots |
| Dimensions | 145.5 × 113.5 × 80.0 mm |
| Weight | ~700 g (body only) |
The SD1 Merrill uses the symmetric Foveon X3 Merrill sensor with all three silicon layers at full 15.3 MP resolution, yielding ~46 MP equivalent colour detail. The later SD Quattro uses the asymmetric Foveon X3 Quattro sensor, with only the top layer at full resolution (19.6 MP) and the lower two layers at 4.9 MP — equivalent to approximately 29 MP total.
In practice:
Choose the SD1 Merrill if you value maximum theoretical colour resolution at base ISO, shoot primarily with a tripod, and process files in Sigma Photo Pro. The Merrill’s symmetric data can yield marginally richer fine-detail colour in optimal conditions.
Choose the SD Quattro if you need faster write speeds, better high-ISO performance, video capability, or a more modern body with electronic shutter. The Quattro generation also accepts Sigma SA, Canon EF (via MC-11), or Sony E (via SA-E adapter) lenses depending on the variant.
Yes. Drop the X3F file from your SD1 Merrill into shuttercount.app and the actuation count is displayed immediately. Sigma X3F files from all Merrill and Quattro generation cameras reliably embed the shot counter in the EXIF block.
Yes, the hardware is identical. The SD1 was originally released in 2011 at approximately $6,900, generating widespread criticism as overpriced for an APS-C DSLR. In 2012, Sigma renamed it the SD1 Merrill (honouring Foveon co-founder Richard Merrill) and simultaneously reduced the price to approximately $2,299. Any SD1 or SD1 Merrill uses the same Foveon X3 Merrill sensor, SA mount, and X3F RAW format.
Sigma Photo Pro (free) is the recommended and correct application. Only Sigma Photo Pro fully processes the three-layer Merrill data. Adobe Lightroom Classic can import Merrill X3F files but uses a Bayer-like pipeline that does not correctly exploit the Foveon architecture, yielding inferior results. Export from Sigma Photo Pro to 16-bit TIFF for post-processing in Lightroom, Photoshop, or Capture One. Processing is slow — 10–20 seconds per file on older hardware.
The SD1 Merrill features dust and splash protection (weather sealing) on the body itself, making it more suitable for outdoor use than the dp compact series. To benefit fully, pair it with a weather-sealed Sigma SA lens. The weather sealing is not on par with professional-grade DSLRs like the Canon 1D-series or Nikon D4, but provides reasonable protection for non-extreme outdoor conditions.
Each X3F file stores full-resolution data from all three Foveon layers at 15.3 MP per layer. This yields file sizes of 30–45 MB per image, comparable to medium-format RAW files. Combined with the SD1 Merrill’s relatively slow in-camera processor, write time per file is approximately 10–20 seconds. Use a fast UHS-I SD card to minimise buffering. The large file size reflects the genuine data density of the symmetric Merrill architecture — three full-resolution layers as opposed to a single Bayer-pattern layer in conventional DSLR sensors.