Rokinon Reflex 300M-M-BK 300mm
Sigma Art 17-40mm f/1.8 DC
What Buyers Say
Rokinon Reflex 300M-M-BK 300mm
The Rokinon 300mm f/6.3 mirror lens is a mixed bag: users praise its compact size, lightweight build, and low price, noting that it can produce sharp images when focus is nailed. However, many struggle with manual focusing, the very thin depth of field, the need for high shutter speeds or a tripod, and the characteristic donut bokeh. It's best suited for patient photographers who understand the limitations of a mirror lens.
Pros
- Compact and lightweight
- Low price
- Good value for money
- Solid build quality
- Acceptable sharpness when focused correctly
Cons
- Difficult manual focus
- Very shallow depth of field
- Donut bokeh (out-of-focus highlights)
- No image stabilization
- Requires tripod or high shutter speed
Sigma Art 17-40mm f/1.8 DC
The Sigma 17-40mm f/1.8 DC DN Art lens is overwhelmingly praised for its exceptional image quality, fast constant aperture, and compact internal zoom design. Users highlight its sharpness, lightweight build, and excellent autofocus performance, especially on crop-sensor mirrorless cameras like the Canon R7 and Fujifilm bodies. A few questions about compatibility with specific cameras and features like weather sealing and aperture ring are noted, but the overall sentiment is extremely positive.
Pros
- Exceptional image quality
- Fast constant f/1.8 aperture
- Compact internal zoom design
- Lightweight build
- Sharp and bright photos
Cons
- No weather sealing mentioned
- No manual aperture ring on some mounts
- Compatibility questions with full-frame cameras
- Expensive for some buyers
Scores
Specifications
| Rokinon Reflex 300M-M-BK 300mm | Sigma Art 17-40mm f/1.8 DC | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 300 mm | 17 mm |
| Focal Length Max | 300 mm | 40 mm |
| Elements | 9 | 17 |
| Groups | 9 | 11 |
| Aspherical Elements | 0 | 4★ |
| ED Elements | 1 | 4★ |
| Coating | UMC (Ultra Multi Coated) | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | f/6.3 | f/1.8 |
| Min Aperture | f/6.3 | f/1.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | 9 | 11★ |
| Build | ||
| Mount | Fujifilm X | Fujifilm X |
| Format | APS-C | APS-C |
| Weather Sealed | — | ✓★ |
| Weight | 0.34 kg★ | 0.54 kg |
| Filter Thread | 58 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | manual focus only | HLA (High-response Linear Actuator) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 900 mm | 280 mm★ |
| Max Magnification | Not specified by | 1:4.8★ |
Pros & Cons
Rokinon Reflex 300M-M-BK 300mm
- Strong build (68th percentile)
- Below average user sentiment (9th percentile)9th %ile
- Below average af (15th percentile)15th %ile
- Below average versatility (33rd percentile)
- Below average stabilization (34th percentile)
Sigma Art 17-40mm f/1.8 DC
- Strong user sentiment (98th percentile)98th %ile
- Strong bokeh (97th percentile)97th %ile
- Strong optical (97th percentile)97th %ile
- Strong aperture (95th percentile)95th %ile
- Below average stabilization (34th percentile)
Verdict
Scores 97 overall, wins 9 of 9 usage categories and 6 of 21 specs.