BM Premium 420mm Lens 420-1600mm
BM Premium
38 Overall Score
vs
Tamron Di III 17-70mm f/2.8 Di III-A VC RXD 70mm
Tamron
97 Overall Score
Scores
Video Cinema
Budget
Macro
Professional
Travel
Portrait
Landscape
Street
Wildlife Sports
Specifications
| BM Premium 420mm Lens 420-1600mm | Tamron Di III 17-70mm f/2.8 Di III-A VC RXD 70mm | |
|---|---|---|
| Optics | ||
| Type | telephoto | zoom |
| Focal Length Min | 420 mm | 17 mm |
| Focal Length Max | 1600 mm | 70 mm |
| Elements | — | 16 |
| Groups | — | 12 |
| Aspherical Elements | — | 3★ |
| ED Elements | — | 2★ |
| Coating | multi-coated optical glass | Fluorine Coating |
| Aperture | ||
| Max Aperture | f/8.3 | f/2.8 |
| Min Aperture | f/8.3 | f/2.8 |
| Constant | ✓ | ✓ |
| Diaphragm Blades | — | 9★ |
| Build | ||
| Mount | Sony A | Sony E |
| Format | — | APS-C★ |
| Weather Sealed | — | ✓★ |
| Weight | 0.98 kg | 0.54 kg★ |
| Filter Thread | 62 mm | 67 mm |
| AF & Stabilization | ||
| AF Type | manual focus only | RXD |
| Stabilization | ✓ | ✓ |
| Focus | ||
| Min Focus Distance | 420 mm | 190 mm★ |
| Max Magnification | — | 1:4.8★ |
Pros & Cons
BM Premium 420mm Lens 420-1600mm
- Strong versatility (86th percentile)86th %ile
- Strong stabilization (82nd percentile)82nd %ile
- Below average user sentiment (1st percentile)1st %ile
- Below average social proof (11th percentile)11th %ile
- Below average af (13th percentile)13th %ile
- Below average build (19th percentile)19th %ile
Tamron Di III 17-70mm f/2.8 Di III-A VC RXD 70mm
- Strong optical (91st percentile)91st %ile
- Strong versatility (90th percentile)90th %ile
- Strong bokeh (87th percentile)87th %ile
- Strong macro (86th percentile)86th %ile
Pricing
BM Premium 420mm Lens 420-1600mm0.253score per dollar
vs
Tamron Di III 17-70mm f/2.8 Di III-A VC RXD 70mm0.162score per dollar
BM Premium 420mm Lens 420-1600mm offers 1.6x better value for money
Verdict
Winner: Tamron Di III 17-70mm f/2.8 Di III-A VC RXD 70mm
Scores 97 overall, wins 9 of 9 usage categories and 8 of 21 specs.
