Viltrox AF 40mm F2.5 40mm
Yongnuo YN23mm F1.4S DA DSM 23mm
What Buyers Say
Viltrox AF 40mm F2.5 40mm
The Viltrox AF 40mm f/2.5 lens is widely praised as an exceptional value, delivering sharp images, good color rendition, and solid autofocus at a fraction of the cost of Sony alternatives. Users highlight its lightweight, compact design, making it ideal for travel and everyday carry. While some note it lacks weather sealing and the maximum aperture is f/2.5 rather than f/2, most find the optical quality and performance far exceed expectations for the price. A few mention it may require some post-processing, but overall sentiment is overwhelmingly positive.
Pros
- Excellent value for money
- Sharp image quality
- Lightweight and compact
- Good autofocus performance
- Pleasant color rendition
Cons
- No weather sealing
- Maximum aperture f/2.5 (not f/2)
- Plastic build (except mount)
- May require post-processing
- Manual focus not linear
Yongnuo YN23mm F1.4S DA DSM 23mm
The Sony FE 70-200mm f/2.8 GM OSS II lens receives overwhelmingly positive feedback for its sharpness, fast autofocus, and excellent build quality. Users highlight its performance in low light and video work, with many noting it as a significant upgrade. A few Q&A entries address concerns about internal movement when off, which is confirmed as normal stabilizer behavior.
Pros
- Sharp image quality
- Fast and quiet autofocus
- Excellent build quality
- Great low-light performance
- Internal zoom mechanism
Cons
- Internal movement when off (normal but concerning)
- Heavier than similar lenses
- Not parfocal
- Focus-by-wire system
Scores
Specifications
| Viltrox AF 40mm F2.5 40mm | Yongnuo YN23mm F1.4S DA DSM 23mm | |
|---|---|---|
| Optics | ||
| Type | prime | prime |
| Focal Length Min | 40 mm | 23 mm |
| Focal Length Max | 40 mm | 23 mm |
| Elements | 10 | 11 |
| Groups | 6 | 9 |
| Aspherical Elements | 1★ | — |
| ED Elements | 1 | 3★ |
| Coating | high-definition nano multi-layer coating | nano-multilayer coating |
| Aperture | ||
| Max Aperture | f/16 | f/1.4 |
| Min Aperture | f/2.5 | f/1.4 |
| Constant | ✗ | ✗ |
| Diaphragm Blades | 7 | 9★ |
| Build | ||
| Mount | Sony E | Sony E |
| Format | full-frame★ | APS-C |
| Weather Sealed | ✗ | ✓★ |
| Weight | 0.17 kg★ | 0.37 kg |
| Filter Thread | 52 mm | 58 mm |
| AF & Stabilization | ||
| AF Type | STM★ | DSM digital stepping motor |
| Stabilization | ✗ | ✓★ |
| Focus | ||
| Min Focus Distance | 340 mm | 23 mm★ |
| Max Magnification | 0.14x★ | 0.1x |
Pros & Cons
Viltrox AF 40mm F2.5 40mm
- Strong build (88th percentile)88th %ile
- Strong af (85th percentile)85th %ile
- Below average bokeh (31st percentile)
- Below average versatility (34th percentile)
- Below average macro (34th percentile)
Yongnuo YN23mm F1.4S DA DSM 23mm
- Strong social proof (99th percentile)99th %ile
- Strong aperture (97th percentile)97th %ile
- Strong bokeh (97th percentile)97th %ile
- Strong user sentiment (91st percentile)91st %ile
- Below average versatility (34th percentile)
Verdict
Scores 94 overall, wins 9 of 9 usage categories and 5 of 21 specs.