BM Premium 420mm Lens 420-800mm
Sigma Contemporary 10-18mm f/2.8 DC DN
What Buyers Say
BM Premium 420mm Lens 420-800mm
The lens receives mixed feedback: some users praise its value for money and image quality for certain uses like architecture, but many report serious issues including incompatibility with Canon EOS R8, poor image quality, flimsy plastic build, and slow autofocus unsuitable for wildlife. The need for a tripod due to bulkiness and manual focus annoyance are also noted.
Pros
- Good value for money
- Decent image quality for architecture
- Pleasant for certain projects
Cons
- Incompatible with Canon EOS R8
- Poor image quality
- Flimsy plastic zoom mechanism
- Slow autofocus for wildlife
- Bulky requiring tripod
Sigma Contemporary 10-18mm f/2.8 DC DN
The Sigma 10-18mm f/2.8 DC DN Contemporary lens is highly praised for its compact, lightweight design and sharp image quality, making it an excellent choice for travel and real estate photography on APS-C cameras. Users appreciate the fast f/2.8 aperture for low-light performance and pleasing background blur, though some note the lack of in-lens stabilization and the need for post-production correction of distortion and vignetting on certain camera systems.
Pros
- Compact and lightweight design
- Sharp image quality across frame
- Fast f/2.8 constant aperture
- Excellent for travel and landscapes
- Good low-light performance
Cons
- No in-lens image stabilization
- Distortion and vignetting need post-production correction
- Lacks aperture ring on some versions
- No USB dock for firmware updates
- In-camera focus stacking not supported on Canon R7
Scores
Specifications
| BM Premium 420mm Lens 420-800mm | Sigma Contemporary 10-18mm f/2.8 DC DN | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 420 mm | 10 mm |
| Focal Length Max | 1600 mm | 18 mm |
| Elements | — | 13 |
| Groups | — | 10 |
| Aspherical Elements | — | 1★ |
| ED Elements | — | 4★ |
| Coating | multi-coated | Super Multi-Layer Coating |
| Aperture | ||
| Max Aperture | f/8.3 | f/2.8 |
| Min Aperture | f/8.3 | f/2.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | — | 7★ |
| Build | ||
| Mount | Canon RF | Sony E |
| Format | — | APS-C★ |
| Weather Sealed | — | ✓★ |
| Weight | 1.14 kg | 0.26 kg★ |
| Filter Thread | 62 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | manual focus only | Autofocus |
| Stabilization | ✓★ | ✗ |
| Focus | ||
| Min Focus Distance | 420 mm | 117 mm★ |
| Max Magnification | — | 1:4★ |
Pros & Cons
BM Premium 420mm Lens 420-800mm
- Strong versatility (86th percentile)86th %ile
- Strong stabilization (79th percentile)
- Below average user sentiment (1st percentile)1st %ile
- Below average build (14th percentile)14th %ile
- Below average af (15th percentile)15th %ile
Sigma Contemporary 10-18mm f/2.8 DC DN
- Strong social proof (94th percentile)94th %ile
- Strong macro (90th percentile)90th %ile
- Strong aperture (88th percentile)88th %ile
- Strong build (87th percentile)87th %ile
- Below average stabilization (34th percentile)
Pricing
BM Premium 420mm Lens 420-800mm offers 3.1x better value for money
Verdict
Scores 94 overall, wins 9 of 9 usage categories and 8 of 21 specs.
