Viltrox · Fujifilm X mount · Updated 31 Aug 2026
AF 13mm F1.4
Fast, sharp, and unusually well corrected for an affordable ultra-wide; one of the strongest third-party astro choices.
Source-normalized independent lab result; cross-system precision is limited.
01 / EDITORIAL TAKE
What the evidence supports
Fast, sharp, and unusually well corrected for an affordable ultra-wide; one of the strongest third-party astro choices.
- Best for
- Astro, Landscape.
- Main tradeoff
- Its 420g weight, F1.4 maximum aperture, and lab mtf evidence profile should be considered against the alternatives below.
02 / VERIFIED SPECIFICATIONS
The decision-grade facts
- 35mm equivalent
- 20mm
- Maximum aperture
- F1.4
- Focus
- AF
- Weight
- 420g
- Dimensions
- Ø74 × 90mm
- Weather resistance
- Yes
- Optical stabilization
- No
- US list price
- $486
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
Placement is led by 1 controlled resolution source; results are normalized only within compatible systems.
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 ±8Sigma12mm F1.4 DC ContemporaryA compact, very fast ultra-wide with ambitious MTF and modern AF—an unusually portable night-sky and interior option.
Resolution 88.0 ±9Tamron11-20mm F2.8 Di III-A RXDBright, compact, and usefully wider than standard zooms; good detail with visible software correction and less reach than Fuji’s 10-24.
Resolution 84.0 ±5