Leica SL3-S vs Sigma BF
The bottom line
There's a real price gap here: the Sigma BF at $1,999 versus the Leica SL3-S at $5,995. The extra buys you faster 30fps burst and in-body stabilisation. The question is whether those advantages are ones you'll use often enough to justify the premium — if not, the cheaper body is the smart buy.
Choose the Leica SL3-S if…
- ✓You shoot action, sports or wildlife — 30fps burst plus dedicated subject-tracking AF keeps up with fast, erratic movement where 8fps would drop frames.
- ✓You shoot video seriously — it brings smoother 120p 4K vs 30p and both mic and headphone jacks for monitored audio.
- ✓You shoot handheld — in-body stabilisation lets you use slower shutter speeds and steadies video, which the other body can't do without a stabilised lens.
- ✓You shoot in low light or indoors — a higher native ISO ceiling (200,000) gives it the edge after dark.
Choose the Sigma BF if…
- ✓You're budget-conscious — it launched at $1,999, about $3,996 less, freeing money for lenses.
- ✓You value portability — at 446g (15.7 oz) it's noticeably lighter than the 768g (1.69 lb) alternative for travel and all-day carry.
Where they differ
- ›Burst: the Leica SL3-S shoots 30fps to the Sigma BF's 8fps — the gap that decides whether you nail the peak moment in sports and wildlife.
- ›Video: the Leica SL3-S is the stronger video tool — 4K up to 120p, 10-bit internal and Log.
- ›Price: the Sigma BF launched at $1,999, $3,996 under the Leica SL3-S — money that could go toward glass.
- ›Stabilisation: only the Leica SL3-S has in-body IS — slower handheld shutter speeds and steadier video without relying on stabilised lenses.
- ›Weight: the Sigma BF is 446g (15.7 oz) vs 768g (1.69 lb) — 322g you'll feel on a long day out.
Frequently asked
Is the Leica SL3-S or the Sigma BF better?
There's a real price gap here: the Sigma BF at $1,999 versus the Leica SL3-S at $5,995. The extra buys you faster 30fps burst and in-body stabilisation. The question is whether those advantages are ones you'll use often enough to justify the premium — if not, the cheaper body is the smart buy.
Who should choose the Leica SL3-S?
Choose the Leica SL3-S if you shoot action, sports or wildlife — 30fps burst plus dedicated subject-tracking AF keeps up with fast, erratic movement where 8fps would drop frames. Choose it if you shoot video seriously — it brings smoother 120p 4K vs 30p and both mic and headphone jacks for monitored audio. Choose it if you shoot handheld — in-body stabilisation lets you use slower shutter speeds and steadies video, which the other body can't do without a stabilised lens. Choose it if you shoot in low light or indoors — a higher native ISO ceiling (200,000) gives it the edge after dark.
Who should choose the Sigma BF?
Choose the Sigma BF if you're budget-conscious — it launched at $1,999, about $3,996 less, freeing money for lenses. Choose it if you value portability — at 446g (15.7 oz) it's noticeably lighter than the 768g (1.69 lb) alternative for travel and all-day carry.
What is the main difference between the Leica SL3-S and the Sigma BF?
Burst: the Leica SL3-S shoots 30fps to the Sigma BF's 8fps — the gap that decides whether you nail the peak moment in sports and wildlife.
| Product | ||
|---|---|---|
| Imaging | ||
| Sensor Type | BSI CMOS | BSI CMOS |
| Sensor Size | Full-Frame | Full-Frame |
| Image Processor | Maestro IV | − |
| Effective Resolution | 24.6 MP | 24.6 MP |
| Lens Mount | Leica L | Leica L |
| Exposure Control | ||
| ISO Range (Native) | 80 – 200000 | 100 – 102400 |
| ISO Range (Extended) | 40 – 400000 | − |
| Mechanical Shutter | 1/8000 | − |
| Electronic Shutter | 1/16000 | 1/25600 |
| Flash Sync Speed | 1/250 | − |
| Built-in Flash | No | No |
| Still Image Capture | ||
| Continuous Shooting | 30 fps | 8 fps |
| Video Capture | ||
| Max Resolution | 6K | 6K |
| 8K Recording | − | − |
| 4K Recording | Up to 120p | Up to 30p |
| 1080p Recording | Up to 240p | Up to 120p |
| 10-bit Internal | Yes | Yes |
| Recording Limit | No limit | No limit |
| Log Profiles | L-Log / HLG / Rec.709 | Sigma Log |
| Built-in Mic | Stereo | Mono |
| Headphone Jack | Yes | No |
| Mic Input | Yes | No |
| HDMI Output | Full-size (Type A) | − |
| Focus | ||
| Phase Detect Points | 779 | 1,215 |
| Contrast Detect Points | − | − |
| Low Light AF | -6 EV | − |
| Eye AF | Yes | Yes |
| Animal AF | Yes | No |
| Vehicle AF | No | No |
| Viewfinder | ||
| EVF Type | OLED | − |
| EVF Resolution | 5.76M dots | − |
| EVF Magnification | 0.78x | − |
| Monitor | ||
| LCD Size | 3.2" | 3.2" |
| LCD Resolution | 2.30M dots | 2.10M dots |
| LCD Type | Tilting | Fixed |
| Touch Screen | Yes | Yes |
| Interface | ||
| Wi-Fi | Wi-Fi 6 | Wi-Fi |
| Bluetooth | v5.0 | − |
| USB | USB-C 3.2 Gen 2 | USB-C |
| Memory Card Slots | 1x CFexpress Type B + 1x SD UHS-II | None (230GB internal storage) |
| GPS | No | No |
| General | ||
| Price (MSRP) | $5,995 | $1,999 |
| Body Material | Aluminum / Magnesium | Aluminum (unibody) |
| Dimensions | 141.2×108×84.6 mm | 130.1×72.8×36.8 mm |
| Weight | 768g (1.69 lb) | 446g (15.7 oz) |
| Weather Sealed | Yes | Yes |
| In-Body Stabilization | Yes | No |
| Battery Life (EVF) | 330 shots | − |
| Battery Life (LCD) | 330 shots | 260 shots |
| Battery Type | BP-SCL6 | BP-81 |
