fanshang Viltrox Lens 56mm F1.7 STM (X-Mount)
Tamron Di III 17-70mm f/2.8 Di III-A VC RXD
What Buyers Say
fanshang Viltrox Lens 56mm F1.7 STM (X-Mount)
This Viltrox 56mm f/1.7 lens is widely praised for its outstanding sharpness, compact size, and remarkable value for money. Users consistently highlight the excellent optical performance, especially on higher-megapixel sensors, and appreciate its lightweight design for travel and street photography. The main drawbacks are the audible autofocus noise, which can be heard from a few feet away, and autofocus speed that lags behind native Fuji glass. Overall, it's considered a fantastic budget prime that delivers professional-quality images despite a few minor compromises.
Pros
- outstanding sharpness
- compact and lightweight design
- excellent value for money
- great bokeh quality
- good for low light
Cons
- audible autofocus noise
- autofocus speed lags behind native glass
- minimum focus distance of 55cm
- plastic/resin build may feel cheap
- minimal controls
Tamron Di III 17-70mm f/2.8 Di III-A VC RXD
The Tamron 17-70mm f/2.8 Di III-A VC RXD lens is widely praised for its sharpness, versatile zoom range, constant aperture, and effective stabilization, making it an excellent all-around lens for APS-C cameras. Users appreciate its solid build quality and value for money, though many note it is noticeably heavier and larger than typical kit lenses, which can feel unbalanced on smaller camera bodies. A few reviewers mention minor issues like chromatic aberration at the longer end and noise from the aperture blades at certain settings, but overall sentiment is very positive.
Pros
- sharp image quality across zoom range
- constant f/2.8 aperture
- effective image stabilization
- fast and quiet autofocus
- versatile 17-70mm focal range
Cons
- heavy and large for APS-C body
- chromatic aberration at 50-70mm
- aperture blade noise above f/5.6
- short zoom throw initially stiff
- no aperture ring on Fuji version
Scores
Specifications
| fanshang Viltrox Lens 56mm F1.7 STM (X-Mount) | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD | |
|---|---|---|
| Optics | ||
| Type | prime | zoom |
| Focal Length Min | 56 mm | 17 mm |
| Focal Length Max | 56 mm | 70 mm |
| Elements | 11 | 16 |
| Groups | 9 | 12 |
| Aspherical Elements | — | 3★ |
| ED Elements | 4★ | 2 |
| Coating | — | Fluorine Coating |
| Aperture | ||
| Max Aperture | f/16 | f/2.8 |
| Min Aperture | f/1.7 | f/2.8 |
| Constant | — | ✓★ |
| Diaphragm Blades | 9 | 9 |
| Build | ||
| Mount | Fujifilm X | Sony E |
| Format | APS-C | APS-C |
| Weather Sealed | — | ✓★ |
| Weight | 0.17 kg★ | 0.54 kg |
| Filter Thread | 52 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | STM★ | RXD |
| Stabilization | ✗ | ✓★ |
| Focus | ||
| Min Focus Distance | 550 mm | 190 mm★ |
| Max Magnification | 0.11x | 1:4.8★ |
Pros & Cons
fanshang Viltrox Lens 56mm F1.7 STM (X-Mount)
- Strong build (88th percentile)88th %ile
- Strong af (86th percentile)86th %ile
- Below average macro (30th percentile)
- Below average user sentiment (30th percentile)
- Below average versatility (34th percentile)
Tamron Di III 17-70mm f/2.8 Di III-A VC RXD
- Strong optical (90th percentile)90th %ile
- Strong versatility (90th percentile)90th %ile
- Strong bokeh (89th percentile)89th %ile
- Strong aperture (87th percentile)87th %ile
Verdict
Scores 97 overall, wins 9 of 9 usage categories and 6 of 21 specs.