THE SUNBURST SCULPTURE

Author

TODAY I USED A SIGMA Dp3 MERRILL CAMERA

Sunburst by Ayelet Lalor - Photographed Using a Sigma DP3 Merrill

SUNBURST BY AYELET LALOR - PHOTOGRAPHED USING A SIGMA DP3 MERRILL

Artwork & Artist Identification

  • Title: Sunburst
  • Artist: Ayelet Lalor
  • Event & Location: Sculpture in Context 2014, National Botanic Gardens, Glasnevin, Dublin
  • Medium & Construction: Mixed media, incorporating acrylic resin, modeled polymer/ferrocement layers, and wire-mesh armature finished with vibrant pigments, mounted atop a weathered timber post. The piece belongs to Lalor’s figurative series exploring expressive female forms, mythology, and dynamic upward-sweeping gestures of energy and light.

The Sigma DP3 Merrill: Love and Frustration

Released in 2013, the Sigma DP3 Merrill occupied a unique, highly specialised niche in digital photography. Equipped with a fixed 50mm f/2.8 lens (a 75mm full-frame equivalent) and an APS-C Foveon X3 direct image sensor, it was engineered with an uncompromising focus on raw optical resolving power.

Why Enthusiasts Loved It

  • Foveon X3 Sensor Micro-Detail: Rather than using a conventional Bayer colour filter array that interpolates colour via demosaicing algorithms, the Foveon sensor records full red, green, and blue colour information at every pixel location by stacking three silicon photodiode layers vertically. At base ISO (ISO 100), this eliminates colour moiré and anti-aliasing softening, producing per-pixel micro-contrast, organic textures, and three-dimensional edge definition comparable to medium-format captures.
  • Matched 50mm f/2.8 Optics: Tailored specifically for the flat silicon sensor plane with tele-centric light delivery, the fixed optic provides biting sharpness across the entire frame wide open. Its short-telephoto perspective and close-focusing capabilities made it particularly well-suited for isolating sculptures, architectural elements, and textural studies.
  • Monochrome Tonal Gradation: Because each silicon layer captures distinct physical depths of luminance data, converting Merrill raw files to black-and-white yields exceptional tonal transitions and grain structure that closely mimics traditional silver halide emulsions.

Why Others Found It Unusable

  • Glacial Operational Speed: Operating the camera demanded deliberate discipline. Autofocus was contrast-detect only, sluggish, and prone to hunting in mixed or low contrast. Writing massive raw files (X3F) caused noticeable operational lag.
  • Severe Battery Depletion: The Foveon sensor and accompanying True II processing engines consumed considerable energy, frequently exhausting a battery in fewer than 80 to 100 shots. Photographers routinely carried three to five spare BP-41 packs for an afternoon outing.
  • Restrictive ISO Usability: While virtually unmatched at ISO 100 and clean at ISO 200, image quality fell off steeply above ISO 400. Higher sensitivity introduced blotchy chroma noise, desaturation, and green/magenta shadow cast, limiting handheld work strictly to good daylight or requiring a tripod.
  • Proprietary Software Pipeline: Unlocking the camera's detail required Sigma Photo Pro (SPP). The slow rendering times and processor-heavy demands of SPP made high-volume batch processing exceptionally time-consuming.