
Sony FE 100-400mm F4.5-5.6 GM OSS vs F5.6-8 OSS
Both are Sony E telephoto zoom lenses for full frame. Here is what actually differs.

Pick the F4.5-5.6 GM OSS if
- You need ⅔ stop more light for low light or background blur (f/4.5 vs f/5.6)
- You shoot close-ups: it focuses down to 0.98 m vs 1.13 m
Pick the F5.6-8 OSS if
- You want the lighter lens to carry: 744 g lighter (654 g vs 1398 g)
- You want bigger close-ups: 0.41× vs 0.35× maximum magnification
- You want a compact lens: 164.5 mm vs 205 mm long
- You prefer a newer design: released 2026 vs 2017
Spec differences
8 differences| F4.5-5.6 GM OSS | F5.6-8 OSS | |
|---|---|---|
| Max aperture |
f/4.5
⅔ stop faster
|
f/5.6
|
| Weight |
1398 g
|
654 g
lighter
|
| Length |
205 mm
|
164.5 mm
shorter
|
| Diameter |
93.9 mm
|
78.2 mm
slimmer
|
| Filter thread |
77 mm
|
67 mm
|
| Min focus distance |
0.98 m
closer
|
1.13 m
|
| Max magnification |
0.35×
|
0.41×
larger
|
| Released |
2017
|
2026
|
6 identical specs hidden: brand, mount, type, format, focal length, image stabilization. Show all
- Brand
- Sony both
- Mount
- Sony E both
- Type
- Telephoto Zoom both
- Format
- Full frame both
- Focal length
- 100-400mm both
- Image stabilization
- Yes both
More comparisons

Tamron 50-400mm F4.5-6.3 Di III VC VXD vs Sony FE 100-400mm F4.5-5.6 GM OSS
Tamron 50-400mm F4.5-6.3 Di III VC VXD: 243 g lighter, wider (50mm)
Tamron 150-500mm F/5-6.7 Di III VC VXD vs Sony FE 100-400mm F5.6-8 OSS
⅓ stop faster vs 1071 g lighter

Tamron 70-300mm F/4.5-6.3 Di III RXD vs Sony FE 100-400mm F4.5-5.6 GM OSS
853 g lighter vs more reach (400mm)

Sony FE 100-400mm F5.6-8 OSS vs Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
486 g lighter vs ⅓ stop faster


Sony FE 100-400mm F4.5-5.6 GM OSS vs Sigma 100-400mm f/5-6.3 DG DN OS Contemporary
⅓ stop faster vs 258 g lighter

Sony FE 100-400mm F5.6-8 OSS vs Sigma 150-600mm f/5-6.3 DG DN OS Sports
1446 g lighter vs ⅓ stop faster