BM Premium 420mm Lens 420-800mm
Sony E 18-135mm f/3.5-5.6 OSS
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
Sony E 18-135mm f/3.5-5.6 OSS
The Sony E 18-135mm f/3.5-5.6 OSS lens is widely praised as an excellent all-in-one travel and walkaround lens for APS-C E-mount cameras. Users consistently highlight its sharpness, compact size, light weight, and versatile 27-200mm equivalent zoom range. While many note it is not ideal for low light and some report significant vignetting at the wide end, the overall sentiment is very positive, with most considering it a great value kit lens upgrade.
Pros
- Sharp image quality
- Compact and lightweight
- Versatile 27-200mm equivalent zoom range
- Effective optical image stabilization
- Fast and accurate autofocus
Cons
- Significant vignetting at 18mm wide end
- Not ideal for low light photography
- Variable aperture limits brightness at telephoto
- Some copies may have quality control issues
- Slight autofocus lag compared to premium lenses
Scores
Specifications
| BM Premium 420mm Lens 420-800mm | Sony E 18-135mm f/3.5-5.6 OSS | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 420 mm | 18 mm |
| Focal Length Max | 1600 mm | 135 mm |
| Elements | — | 16 |
| Groups | — | 12 |
| Aspherical Elements | — | 1★ |
| ED Elements | — | 2★ |
| Coating | multi-coated | — |
| Aperture | ||
| Max Aperture | f/8.3 | f/3.5 |
| Min Aperture | f/8.3 | 3.5-5.6 |
| Constant | ✓★ | ✗ |
| Diaphragm Blades | — | 7★ |
| Build | ||
| Mount | Canon RF | Sony E |
| Format | — | APS-C★ |
| Weather Sealed | — | ✗ |
| Weight | 1.14 kg | 0.33 kg★ |
| Filter Thread | 62 mm | 55 mm |
| AF & Stabilization | ||
| AF Type | manual focus only | Linear motor★ |
| Stabilization | ✓ | ✓ |
| Focus | ||
| Min Focus Distance | 420 mm★ | 450 mm |
| Max Magnification | — | 0.29x★ |
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
Sony E 18-135mm f/3.5-5.6 OSS
- Strong af (98th percentile)98th %ile
- Strong versatility (96th percentile)96th %ile
- Strong social proof (91st percentile)91st %ile
- Strong aperture (83rd percentile)83rd %ile
Pricing
BM Premium 420mm Lens 420-800mm offers 1.9x better value for money
Verdict
Scores 92 overall, wins 9 of 9 usage categories and 7 of 21 specs.
