Sony
Alpha 6600
APS-C with IBIS and huge NP-FZ100 battery in a compact body.
$1,399
Released Oct 2019
Sony
Alpha 7S III
12MP low-light video specialist with 4K 120p, 16-bit RAW HDMI, and excellent autofocus.
$3,499
Released Sep 2020
Alpha 7S III is 11 months newer.
Wins
Alpha 6600
Wins
Alpha 7S III
2 categories tied
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TL;DR — Key differences
- BAlpha 7S III has higher 4K max frame rate (120 fps vs 30 fps)
- BAlpha 7S III has higher Max video bit rate (600 Mbps vs 150 Mbps)
- BAlpha 7S III has higher EVF resolution (9,437,184 vs 2,359,296)
- BAlpha 7S III has higher ISO max (native) (102,400 vs 32,000)
- AAlpha 6600 has higher Resolution (24.2 MP vs 12.1 MP)
Key specs at a glance
Size and weight, to scale
Alpha 6600
120 × 67 × 69 mm
503 g (1.11 lb / 17.74 oz)
Alpha 7S III
129 × 97 × 81 mm
699 g (1.54 lb / 24.66 oz)
Alpha 6600 is 9mm narrower, 30mm shorter, and 12mm thinner than Alpha 7S III.
Alpha 6600 is 196 g lighter than Alpha 7S III.
Depth (front-to-back): 69mm Alpha 6600 · 81mm Alpha 7S III
Sensor size, to scale
Alpha 6600
23.5 × 15.6 mm · APS-C
367 mm² area
Alpha 7S III
35.6 × 23.8 mm · Full Frame
847 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
Alpha 6600
✓ more lensesSony E
350+
native lenses available
Alpha 7S 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
Alpha 6600
Dimensions (W×H×D mm)
Adds 120, 66.9, 69.3
Card types
Adds SD UHS-I
Resolution
24.2 MP vs 12.1 MP — higher is better
Codecs
Adds AVCHD
Weight
503 g vs 699 g — lower is better
Battery life (CIPA)
810 shots vs 600 shots — higher is better
Burst (mechanical)
11 fps vs 10 fps — higher is better
Burst (electronic)
11 fps vs 10 fps — higher is better
Reasons to choose
Alpha 7S III
AF low-light limit
-6 EV vs -2 EV — lower is better
Dimensions (W×H×D mm)
Adds 128.9, 96.9, 80.8
Card types
Adds CFexpress Type A, SD UHS-II
4K max frame rate
120 fps vs 30 fps — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
EVF resolution
9,437,184 vs 2,359,296 — higher is better
ISO max (native)
102,400 vs 32,000 — higher is better
Codecs
Adds XAVC HS, XAVC S-I, H.265
Both cameras share
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
- ✓EVF refresh rate — Both 120 Hz
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 6600
Pros
- ✓IBIS in APS-C
- ✓Excellent battery
- ✓Real-time tracking AF
Cons
- –Older than A6700
- –Single slot
- –No 4K 60p
Alpha 7S III
Pros
- ✓Best-in-class low light
- ✓4K 120p
- ✓Full-size HDMI
- ✓Strong IBIS
Cons
- –12MP stills limit
- –Older generation now
- –No 8K
Decided which one is right for you?
Compare live prices for the Alpha 6600 and Alpha 7S III at major authorized retailers.
Sony Alpha 6600
Sony Alpha 7S III
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, Alpha 6600 or Alpha 7S III?
Alpha 7S III scores 8.0/10 versus 5.0/10 for Alpha 6600 — 4K recording.
What's the resolution difference between the Alpha 6600 and Alpha 7S III?
Alpha 6600 is 24.2 MP and Alpha 7S III is 12.1 MP, so the Alpha 6600 captures more detail for cropping and large prints.
Do the Alpha 6600 and Alpha 7S III have in-body image stabilization?
Alpha 6600 has 5-stop in-body image stabilization, while alpha 7S III has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the Alpha 6600 or the Alpha 7S III?
Alpha 6600 reaches 11 fps electronic. Alpha 7S III reaches 10 fps electronic.
What's the weight difference between the Alpha 6600 and Alpha 7S III?
Alpha 6600 weighs 503 g and Alpha 7S III weighs 699 g, so the Alpha 6600 is 196 g lighter.
Do the Alpha 6600 and Alpha 7S III record 4K video?
Alpha 6600: 4K up to 30p. Alpha 7S III: 4K up to 120p.
Are the Alpha 6600 and Alpha 7S III weather sealed?
Alpha 6600: Yes. Alpha 7S III: Yes.
Which has better battery life?
Rated battery life is 810 shots (CIPA) for the Alpha 6600 and 600 shots for the Alpha 7S III, giving the Alpha 6600 the edge.
How much does each cost?
Alpha 6600 launched at $1,399 and Alpha 7S III at $3,499. The Alpha 6600 is $2,100 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.