challenger A
Leica
SL3-S
2025
VS
challenger B
Sigma
BF
2025
ReviewsSigma BF
Leica SL3-S vs Sigma BF — full comparison
Visual summary
— Reads in 5 seconds
8,1/ 10
PhotoExcellent
8,0/ 10
VideoExcellent
Leica
SL3-S
4,2/ 10
PhotoLimité
5,3/ 10
VideoCorrect
Sigma
BF
Leica SL3-SSigma BF
Where to buy
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Leica SL3-S
Leica SL3-S Mirrorless Camera (Black) #10643
4 489 GBP · Clifton Cameras
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Standout strengths
— Where each camera shines
Leica
SL3-S
Top advantages
- 200 000Native ISO max2× vs Sigma BF
- 30 fpsElectronic burst3,8× vs Sigma BF
- 200 000Extended ISO max2× vs Sigma BF
- 1944 Mb/sMax bitrate9,7× vs Sigma BF
Sigma
BF
Top advantages
- 120 fpsMax video fps4× vs Leica SL3-S
- 1215AF points1,6× vs Leica SL3-S
- 1×4K crop1,5× vs Leica SL3-S
- 388 gWeight2× vs Leica SL3-S
Detailed spec-by-spec
— Round by round, the eight categories
Round 1
Sensor
SpecLeica SL3-SSigma BF
Sensor format
Full Frame
Full Frame
Sensor type
Stacked CMOS
CMOS
Megapixels
24.6 MP
24.6 MP
Sensor size
36 × 24 mm
36 × 24 mm
Native ISO min
50
100
Native ISO max
200 000
102 400
Extended ISO max
200 000
102 400
Dynamic range (EV)
10.9 EV
—
Round 2
Autofocus
SpecLeica SL3-SSigma BF
AF points
779
1215
AF coverage
100 %
—
Eye AF (human)
Oui
Oui
Eye AF (animal)
Oui
Oui
AF low light (EV)
—
-5 EV
Round 3
Speed & burst
SpecLeica SL3-SSigma BF
Mechanical burst
7 fps
—
Electronic burst
30 fps
8 fps
RAW buffer
—
350
Max shutter speed
1/16000
1/8000
Round 4
Video
SpecLeica SL3-SSigma BF
Max video resolution
6K
6K
Max video fps
30 fps
120 fps
Max bitrate
1944 Mb/s
200 Mb/s
Video codecs
H.264, H.265, ProRes
H.265, H.264
Recording modes
All-I, Long-GOP
Long-GOP
Chroma subsampling
4:2:0, 4:2:2
4:2:0
Bit depth
10-bit
10-bit
Log profile
Oui
Oui
Log profiles
Leica L-Log, HLG
L-Log
Internal RAW
Non
Non
External RAW
ProRes RAW
—
Rolling shutter
1.5 ms
—
4K crop
1.5×
1×
Oversampling
Oui
—
Open Gate
Oui
Non
Anamorphic desqueeze
1.3x, 1.5x, 1.8x, 2.0x
—
LUT support
user LUTs, in-camera LUT preview
—
Monitoring tools
waveform, vectorscope, false color, histogram, zebras
histogram, zebras, false color
Active cooling
Non
Non
Recording limit
Illimité
120 min
Unlimited recording
Oui
Non
Dual Native ISO
Oui
Oui
Proxy recording
Oui
Non
XLR input
Non
Non
32-bit float audio
Non
Non
Genlock + Time Code
Oui
Non
Round 5
Stabilisation
SpecLeica SL3-SSigma BF
In-body stabilisation
Oui
Non
IBIS rating
5 stops
—
Round 6
Build
SpecLeica SL3-SSigma BF
Weather sealing
Oui
Non
Dual card slots
Oui
Non
Card types
SD UHS-II, CFexpress Type B
SSD 230GB intégré
Round 7
Ergonomics & screen
SpecLeica SL3-SSigma BF
Weight
768 g
388 g
Dimensions
141.2 x 108 x 82.7
130.1 x 72.8 x 36.8
Viewfinder type
OLED EVF
None
Viewfinder resolution
5.76 M dots
—
Viewfinder magnification
0.76×
—
Screen size
3.2″
3.2″
Screen resolution
2.33 M dots
2.10 M dots
Screen articulation
tilt
fixed
Touchscreen
Oui
Oui
Round 8
Connectivity & battery
SpecLeica SL3-SSigma BF
Battery life (CIPA)
315 clichés
260 clichés
USB type
USB-C 10Gbps
USB-C 3.2 Gen2 (10 Gbps)
HDMI type
Full HDMI
Micro (Type D)
Wi-Fi
Oui
Non
Bluetooth
Oui
Non