Kase Reflex Mirror 150mm f/5.6 AF Reflex Mirror Lens 150mm
Sigma Art 17-40mm f/1.8 DC
What Buyers Say
Kase Reflex Mirror 150mm f/5.6 AF Reflex Mirror Lens 150mm
The Sony FE 70-200mm f/2.8 GM OSS II lens is widely praised for its sharpness, fast autofocus, and low-light performance. Users find it excellent for both photo and video, with many noting a noticeable upgrade over older models. A few Q&A entries raise concerns about internal movement when the lens is off or detached, but the majority of reviewers are extremely satisfied.
Pros
- Incredibly sharp images
- Fast and snappy autofocus
- Excellent low-light performance
- Great for both photo and video
- Solid build quality
Cons
- Internal movement when lens is off or detached
- Uncertainty about long-term durability
- Loose internal part raises concern
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
| Kase Reflex Mirror 150mm f/5.6 AF Reflex Mirror Lens 150mm | Sigma Art 17-40mm f/1.8 DC | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 150 mm | 17 mm |
| Focal Length Max | 150 mm | 40 mm |
| Elements | 5 | 17 |
| Groups | 4 | 11 |
| Aspherical Elements | — | 4★ |
| ED Elements | — | 4★ |
| Coating | Multicoated Optical Glass | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | f/5.6 | f/1.8 |
| Min Aperture | f/5.6 | f/1.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | — | 11★ |
| Build | ||
| Mount | Nikon Z | Fujifilm X |
| Format | full-frame★ | APS-C |
| Weather Sealed | — | ✓★ |
| Weight | 1.04 kg | 0.54 kg★ |
| Filter Thread | 67 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | Autofocus | HLA (High-response Linear Actuator) |
| Stabilization | ✗ | ✗ |
| Focus | ||
| Min Focus Distance | 1.50 m | 280 mm★ |
| Max Magnification | — | 1:4.8★ |
Pros & Cons
Kase Reflex Mirror 150mm f/5.6 AF Reflex Mirror Lens 150mm
- Strong social proof (99th percentile)99th %ile
- Strong user sentiment (82nd percentile)82nd %ile
- Below average optical (4th percentile)4th %ile
- Below average build (16th percentile)16th %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)
Pricing
Sigma Art 17-40mm f/1.8 DC offers 1.6x better value for money
Verdict
Scores 96 overall, wins 9 of 9 usage categories and 7 of 21 specs.
