Sony FE 20-70mm f/4 G vs Sony FE 85mm f/1.4 GM II
The bottom line
These cover different focal lengths — the Sony FE 20-70mm f/4 G is 20-70mm, the Sony FE 85mm f/1.4 GM II is 85mm — so they're not really substitutes. Pick by the field of view you actually need: the Sony FE 20-70mm f/4 G for standard zoom, the Sony FE 85mm f/1.4 GM II for short-telephoto / portrait.
Choose the Sony FE 20-70mm f/4 G if…
- ✓You shoot wide — it starts at 20mm vs 85mm for landscapes, interiors and architecture.
- ✓You're on a budget — $1,099 vs $1,799 leaves more for other gear.
- ✓You want one-lens flexibility — a 20-70mm zoom covers what the fixed 85mm can't reframe.
- ✓You value portability — at 488g (1.08 lb) it's lighter than the 642g (1.42 lb) alternative for travel and all-day carry.
Choose the Sony FE 85mm f/1.4 GM II if…
- ✓You want more light and background blur — f/1.4 is faster than f/4, better for low light and subject separation.
- ✓You prefer a fast, compact single focal length — an 85mm prime over a zoom.
Where they differ
- ›Aperture: the Sony FE 85mm f/1.4 GM II opens to f/1.4 vs the Sony FE 20-70mm f/4 G's f/4 — more light and shallower depth-of-field.
- ›Focal range: Sony FE 20-70mm f/4 G is 20-70mm, Sony FE 85mm f/1.4 GM II is 85mm — different framing and reach.
- ›Type: the Sony FE 20-70mm f/4 G is a zoom (flexible framing), the Sony FE 85mm f/1.4 GM II a prime (one focal length, usually brighter and lighter).
- ›Price: the Sony FE 20-70mm f/4 G is $1,099, $700 under the Sony FE 85mm f/1.4 GM II.
- ›Close-up: the Sony FE 20-70mm f/4 G reaches 0.39x magnification vs 0.12x — more for close-up and macro work.
- ›Weight: the Sony FE 20-70mm f/4 G is 488g (1.08 lb) vs 642g (1.42 lb) — you'll feel the difference handheld.
Frequently asked
Is the Sony FE 20-70mm f/4 G or the Sony FE 85mm f/1.4 GM II better?
These cover different focal lengths — the Sony FE 20-70mm f/4 G is 20-70mm, the Sony FE 85mm f/1.4 GM II is 85mm — so they're not really substitutes. Pick by the field of view you actually need: the Sony FE 20-70mm f/4 G for standard zoom, the Sony FE 85mm f/1.4 GM II for short-telephoto / portrait.
Who should choose the Sony FE 20-70mm f/4 G?
Choose the Sony FE 20-70mm f/4 G if you shoot wide — it starts at 20mm vs 85mm for landscapes, interiors and architecture. Choose it if you're on a budget — $1,099 vs $1,799 leaves more for other gear. Choose it if you want one-lens flexibility — a 20-70mm zoom covers what the fixed 85mm can't reframe. Choose it if you value portability — at 488g (1.08 lb) it's lighter than the 642g (1.42 lb) alternative for travel and all-day carry.
Who should choose the Sony FE 85mm f/1.4 GM II?
Choose the Sony FE 85mm f/1.4 GM II if you want more light and background blur — f/1.4 is faster than f/4, better for low light and subject separation. Choose it if you prefer a fast, compact single focal length — an 85mm prime over a zoom.
What is the main difference between the Sony FE 20-70mm f/4 G and the Sony FE 85mm f/1.4 GM II?
Aperture: the Sony FE 85mm f/1.4 GM II opens to f/1.4 vs the Sony FE 20-70mm f/4 G's f/4 — more light and shallower depth-of-field.
| Product | ||
|---|---|---|
| Optical Design | ||
| Focal Length | 20-70mm | 85mm |
| Lens Type | Zoom | Prime |
| Optical Elements | 16 | 14 |
| Optical Groups | 13 | 11 |
| Aperture & Iris | ||
| Maximum Aperture | f/4 | f/1.4 |
| Minimum Aperture | f/22 | f/16 |
| Aperture Blades | 9 | 11 |
| Rounded Aperture | Yes | Yes |
| Coverage & Angle | ||
| Format Coverage | Full-Frame | Full-Frame |
| Lens Mount | Sony E | Sony E |
| Angle of View | 94° – 34° | 28.5° – 28.5° |
| 35mm Equivalent | − | − |
| Focus | ||
| Autofocus | Yes | Yes |
| Focus Motor | XD Linear | XD Linear |
| Focus Limiter | No | No |
| AF/MF Switch | Yes | Yes |
| Min Focus Distance | 25 cm | 80 cm |
| Max Magnification | 0.39x | 0.12x |
| Stabilization & Video | ||
| Optical Stabilization | No | No |
| Aperture Ring | Yes | Yes |
| Declickable Aperture | Yes | Yes |
| Parfocal | No | No |
| Internal Zoom | No | No |
| General | ||
| Price (MSRP) | $1,099 | $1,799 |
| Filter Size | 72mm | 77mm |
| Diameter | 78.7mm | 84.7mm |
| Length | 99mm | 107.3mm |
| Weight | 488g (1.08 lb) | 642g (1.42 lb) |
| Weather Sealed | Yes | Yes |
| Tripod Collar | No | No |
