BM Premium 420mm Lens 420-800mm
Tamron Di III VC 28-300mm f/4-7.1 Di III VC VXD 300mm
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
Tamron Di III VC 28-300mm f/4-7.1 Di III VC VXD 300mm
The Tamron 28-300mm super-zoom wins praise for its lightweight design, versatile focal range, and solid image quality. Users appreciate the compact build and smooth zoom mechanism, but note the slow aperture and trade-offs in sharpness compared to more expensive zooms. Verified reviewers find it an ideal travel lens that pairs well with Sony bodies.
Pros
- Lightweight design
- Versatile 28-300mm focal range
- Smooth zoom ring operation
- Compact build for travel
- Good integration with Sony bodies
Cons
- Small maximum aperture (f/4-7.1)
- Reduced sharpness vs. premium zooms
- Not an internal zoom lens
- Slow autofocus at high fps on some bodies
Scores
Specifications
| BM Premium 420mm Lens 420-800mm | Tamron Di III VC 28-300mm f/4-7.1 Di III VC VXD 300mm | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 420 mm | 28 mm |
| Focal Length Max | 1600 mm | 300 mm |
| Elements | — | 20 |
| Groups | — | 13 |
| Aspherical Elements | — | 3★ |
| ED Elements | — | 2★ |
| Coating | multi-coated | fluorine coating |
| Aperture | ||
| Max Aperture | f/8.3 | f/4 |
| Min Aperture | f/8.3 | 4-7.1 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | — | 9★ |
| Build | ||
| Mount | Canon RF | Sony E |
| Format | — | full-frame★ |
| Weather Sealed | — | ✓★ |
| Weight | 1.14 kg | 0.59 kg★ |
| Filter Thread | 62 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | manual focus only | VXD linear motor★ |
| Stabilization | ✓ | ✓ |
| Focus | ||
| Min Focus Distance | 420 mm | 190 mm★ |
| Max Magnification | — | 1:2.8★ |
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
Tamron Di III VC 28-300mm f/4-7.1 Di III VC VXD 300mm
- Strong versatility (98th percentile)98th %ile
- Strong af (98th percentile)98th %ile
- Strong optical (96th percentile)96th %ile
- Strong user sentiment (92nd percentile)92nd %ile
Pricing
BM Premium 420mm Lens 420-800mm offers 2.1x better value for money
Verdict
Scores 100 overall, wins 9 of 9 usage categories and 9 of 21 specs.
