Sigma · Fujifilm X mount · Updated 31 Aug 2026
12mm F1.4 DC Contemporary
A compact, very fast ultra-wide with ambitious MTF and modern AF—an unusually portable night-sky and interior option.
Maker MTF available, but its method is not normalized to Fujifilm's curves.
01 / EDITORIAL TAKE
What the evidence supports
A compact, very fast ultra-wide with ambitious MTF and modern AF—an unusually portable night-sky and interior option.
- Best for
- Astro, Architecture.
- Main tradeoff
- Its 225g weight, F1.4 maximum aperture, and manufacturer mtf evidence profile should be considered against the alternatives below.
02 / VERIFIED SPECIFICATIONS
The decision-grade facts
- 35mm equivalent
- 18mm
- Maximum aperture
- F1.4
- Focus
- AF
- Weight
- 225g
- Dimensions
- Ø68 × 69.7mm
- Weather resistance
- Yes
- Optical stabilization
- No
- US list price
- $629
MSRP is a static US list-price reference, not a live offer. Verified 2026-08-30. Price source ↗
03 / EVIDENCE
What the rank rests on
A maker chart exists, but its method is not standardized against Fujifilm or independent labs.
04 / ALTERNATIVES
Compare before deciding
An older but optically honest ultra-wide with low native distortion and strong stopped-down detail; AF and sealing show its age.
Resolution 88.7 ±8ViltroxAF 13mm F1.4Fast, sharp, and unusually well corrected for an affordable ultra-wide; one of the strongest third-party astro choices.
Resolution 91.0 ±5ZeissTouit 12mm F2.8Low distortion, strong color and contrast, and good edges make this older ultra-wide relevant; AF and value are dated.
Resolution 80.0 ±12