Sigma
fp L
World's smallest full-frame interchangeable camera with 61MP and L-mount.
$2,499
Launch priceReleased Jul 2021
Sony
Alpha 9 III
Global shutter sports flagship with 120fps and zero rolling shutter for pro action.
$5,999
Launch priceReleased Jan 2024
Alpha 9 III is 2.6 years newer.
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Wins
fp L
Wins
Alpha 9 III
2 categories tied
Which would you choose?
TL;DR — Key differences
- Afp L has higher Burst (mechanical) (6 fps vs 0 fps)
- BAlpha 9 III has higher RAW buffer depth (200 frames vs 12 frames)
- BAlpha 9 III has higher AF points / zones (759 vs 49)
- BAlpha 9 III has higher Burst (electronic) (120 fps vs 10 fps)
- BAlpha 9 III has higher 4K max frame rate (120 fps vs 29.97 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
fp L
113 × 70 × 45 mm
427 g (0.94 lb / 15.06 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 9 III
136 × 97 × 83 mm
703 g (1.55 lb / 24.80 oz)
fp L is 24mm narrower, 27mm shorter, and 38mm thinner than Alpha 9 III.
fp L is 276 g lighter than Alpha 9 III.
Depth (front-to-back): 45mm fp L · 83mm Alpha 9 III
Back view, to scale
Width × Height — same proportions as the front of the body.
fp L
113 × 70 mm
Credit card
85.6 × 54 mm
Alpha 9 III
136 × 97 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
fp L
113 × 45 mm
Credit card
85.6 × 54 mm
Alpha 9 III
136 × 83 mm
Sensor size, to scale
fp L
36 × 24 mm · Full Frame
864 mm² area
Alpha 9 III
35.6 × 23.8 mm · Full Frame
847 mm² area
Lens ecosystem
Native lens selection
fp L: mount data unavailable
Alpha 9 III
✓ more lensesSony E
350+
native lenses available
Counts include current first-party and major third-party native autofocus lenses.
Use-case scoring
Which one for what?
Algorithmic scores from verified specs · 10 = best in class
Why pick one over the other
Reasons to choose
fp L
Burst (mechanical)
6 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 112.6, 69.9, 45.3
Card types
Adds SD, SDHC, SDXC
Codecs
Adds CinemaDNG, MOV
ISO min (native)
100 vs 250 — lower is better
Resolution
61 MP vs 24.6 MP — higher is better
Weight
427 g vs 703 g — lower is better
Subject recognition
Adds Vehicle
Reasons to choose
Alpha 9 III
Dimensions (W×H×D mm)
Adds 136.1, 96.9, 82.9
Card types
Adds CFexpress Type A, SD UHS-II
RAW buffer depth
200 frames vs 12 frames — higher is better
AF points / zones
759 vs 49 — higher is better
Burst (electronic)
120 fps vs 10 fps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
4K max frame rate
120 fps vs 29.97 fps — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
- ✓Internal RAW video — Both support internal raw video
Pros & cons at a glance
Editorially curated highlights and trade-offs.
fp L
Pros
- ✓Tiny full-frame
- ✓61MP
- ✓L-mount
- ✓Unique industrial design
Cons
- –No IBIS
- –Small battery
- –Minimal ergonomics
Alpha 9 III
Pros
- ✓Global shutter 120fps
- ✓Zero rolling shutter
- ✓Pro sports AF
- ✓Pre-capture buffer
Cons
- –24.6MP only
- –Premium price
- –Battery drain at max speed
Decided which one is right for you?
Compare live prices for the fp L and Alpha 9 III at major authorized retailers.
Sigma fp L
Sony Alpha 9 III
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, fp L or Alpha 9 III?
Alpha 9 III scores 8.0/10 versus 3.5/10 for fp L — 4K recording.
What's the resolution difference between the fp L and Alpha 9 III?
fp L is 61 MP and Alpha 9 III is 24.6 MP, so the fp L captures more detail for cropping and large prints.
Do the fp L and Alpha 9 III have in-body image stabilization?
fp L does not have IBIS, while Alpha 9 III has 8-stop in-body image stabilization.
Which shoots faster bursts — the fp L or the Alpha 9 III?
fp L reaches 10 fps electronic. Alpha 9 III reaches 120 fps electronic.
What's the weight difference between the fp L and Alpha 9 III?
fp L weighs 427 g and Alpha 9 III weighs 703 g, so the fp L is 276 g lighter.
Do the fp L and Alpha 9 III record 4K video?
fp L: 4K up to 29.97p. Alpha 9 III: 4K up to 120p.
Are the fp L and Alpha 9 III weather sealed?
fp L: Yes. Alpha 9 III: Yes.
Which has better battery life?
Rated battery life is 240 shots (CIPA) for the fp L and 400 shots for the Alpha 9 III, giving the Alpha 9 III the edge.
How much does each cost?
fp L launched at $2,499 and Alpha 9 III at $5,999. The fp L is $3,500 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way fp L vs Alpha 9 III vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Sigma and Sony press materials.