Metabones MB_SPNFG-M43-BM2
The 0.64x Speed Booster XL uses a 6-element optical design to widen full-frame Nikkor lenses to a 1.28x crop factor on Micro Four Thirds bodies, boosting maximum aperture by 1 1/3 stops to f/0.80. Its click-less aperture ring spans an 8-stop range with marked f-stops, and the adapter supports both G and F mount lenses including non-AI variants. This is best for GH4 video shooters who need super-35 field of view and extreme low-light capability from existing Nikon glass.
Weight 200 g
43 Overall Score
Price CA$0
Snapshot
The proof
Performance
Specifications
Full Specifications
Aperture
| Min Aperture | f/0.8 |
Build
| Weight | 0.2 kg / 0.4 lbs |
vs Competition
| Spec | Metabones MB_SPNFG-M43-BM2 | Tamron Di III VC 28-300mm f/4-7.1 VXD | Sigma Contemporary 18-50mm f/2.8 DC DN | Nikon NIKKOR Z 17-28mm f/2.8 | Panasonic Leica DG Vario-Elmarit H-ES12035 | Sony E 18-135mm f/3.5-5.6 OSS |
|---|---|---|---|---|---|---|
| Focal Length | - | 28-300mm | 18-50mm | 17-28mm | 12-35mm | 18-135mm |
| Max Aperture | - | f/4 | f/2.8 | f/2.8 | f/2.8 | f/3.5 |
| Mount | - | Sony E | Sony E | Nikon Z | Micro Four Thirds | Sony E |
| Stabilization | false | true | false | false | true | true |
| Weather Sealed | false | true | true | true | true | false |
| Weight (g) | 200 | 590 | 290 | 450 | 306 | 326 |
| AF Type | - | VXD linear motor | stepping motor | Stepping Motor | Autofocus | Linear motor |
| Lens Type | - | zoom | zoom | zoom | zoom | zoom |
| Compare | Compare | Compare | Compare | Compare |
| Product | AF | Bokeh | Build | Macro | Optical | Aperture | Versatility | Stabilization |
|---|---|---|---|---|---|---|---|---|
| Metabones MB_SPNFG-M43-BM2 | 53.9 | 64.8 | 82.2 | 14.2 | 20.2 | 66.3 | 33.6 | 36.8 |
| Tamron Di III VC 28-300mm f/4-7.1 VXD Compare | 98 | 78.2 | 65.1 | 85.8 | 96.7 | 66.3 | 97.7 | 82.4 |
| Sigma Contemporary 18-50mm f/2.8 DC DN Compare | 86.9 | 82.1 | 86.1 | 91.7 | 82.2 | 84.2 | 78.6 | 36.8 |
| Nikon NIKKOR Z 17-28mm f/2.8 Compare | 86.9 | 87.3 | 75.2 | 85.8 | 88.2 | 84.2 | 68 | 36.8 |
| Panasonic Leica DG Vario-Elmarit H-ES12035 Compare | 53.9 | 82.1 | 85.4 | 51 | 86.5 | 84.2 | 80.6 | 96.9 |
| Sony E 18-135mm f/3.5-5.6 OSS Compare | 98 | 75.7 | 72.5 | 40.3 | 78.5 | 77.6 | 95.8 | 82.4 |
Price
Value & Pricing
We started tracking prices for this product on Jul 18, 2026. The chart appears once we have more data.
