Sony
Alpha 7 III
Classic 24MP hybrid that defined the modern full-frame value proposition.
$1,999
Launch priceReleased Feb 2018
Sony
FX5
2026 Cinema Line full-frame camera with 16.6MP stacked Exmor RS, 5K Open Gate, internal 16-bit X-OCN RAW, triple base ISO, and FX3-class compact mobility.
$4,899
Launch priceReleased Aug 2026
FX5 is 8.5 years newer.
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Wins
Alpha 7 III
Wins
FX5
3 categories tied
Which would you choose?
TL;DR — Key differences
- AAlpha 7 III has higher Burst (mechanical) (10 fps vs 0 fps)
- AAlpha 7 III has higher Burst (electronic) (10 fps vs 0 fps)
- AAlpha 7 III has lower ISO min (native) (100 vs 800)
- AAlpha 7 III has higher ISO max (native) (51,200 vs 12,800)
- BFX5 has higher 4K max frame rate (120 fps vs 30 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareAlpha 7 III
127 × 96 × 74 mm
650 g (1.43 lb / 22.93 oz)
Credit card
85.6 × 54 mm
for scale
FX5
132 × 79 × 87 mm
734 g (1.62 lb / 25.89 oz)
Alpha 7 III is 5mm narrower and 13mm thinner than FX5 but it is also 17mm taller.
Alpha 7 III is 84 g lighter than FX5.
Depth (front-to-back): 74mm Alpha 7 III · 87mm FX5
Back view, to scale
Width × Height — same proportions as the front of the body.
Alpha 7 III
127 × 96 mm
Credit card
85.6 × 54 mm
FX5
132 × 79 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
Alpha 7 III
127 × 74 mm
Credit card
85.6 × 54 mm
FX5
132 × 87 mm
Sensor size, to scale
Alpha 7 III
35.6 × 23.8 mm · Full Frame
847 mm² area
FX5
35.7 × 23.8 mm · Full Frame
850 mm² area
Lens ecosystem
Native lens selection
Alpha 7 III
✓ more lensesSony E
350+
native lenses available
FX5
✓ 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 7 III
Burst (mechanical)
10 fps vs 0 fps — higher is better
Burst (electronic)
10 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 126.9, 95.6, 73.7
ISO min (native)
100 vs 800 — lower is better
ISO max (native)
51,200 vs 12,800 — higher is better
Card types
Adds SD UHS-I
Codecs
Adds AVCHD
Resolution
24.2 MP vs 16.6 MP — higher is better
Reasons to choose
FX5
AF low-light limit
-6 EV vs -3 EV — lower is better
Dimensions (W×H×D mm)
Adds 132.3, 79, 86.95
4K max frame rate
120 fps vs 30 fps — higher is better
Codecs
Adds X-OCN LT, X-OCN C1, X-OCN C2…
EVF resolution
7,070,000 vs 2,359,296 — higher is better
Max video bit rate
200 Mbps vs 100 Mbps — higher is better
Internal RAW video
Only FX5 supports it
Card types
Adds CFexpress Type A
Both cameras share
- ✓AA filter — Both support aa filter
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
- ✓Weather sealing — Both support weather sealing
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 7 III
Pros
- ✓Proven reliability
- ✓Great battery life
- ✓Strong value used
- ✓Dual card slots
Cons
- –Older AF vs newer bodies
- –4K 30p only
- –No 10-bit internal
FX5
Pros
- ✓5K Open Gate + internal X-OCN RAW (LT / C1 / C2)
- ✓Triple base ISO 800 / 4000 / 12800 + Dual Gain
- ✓15+ stops DR (S-Log3) + BIONZ XR2 AI AF
- ✓5K 60p / 4K 120p / FHD 240p at launch
- ✓Compact body with IBIS, cooling, dual card slots
Cons
- –Body-only $4,899 — XLR handle / OLED EVF optional
- –Open Gate X-OCN only at launch (XAVC Open Gate via FW)
- –4K 240p / 5K 120p planned for 2027 firmware
- –No built-in EVF (optional DVF-EL1)
Decided which one is right for you?
Compare live prices for the Alpha 7 III and FX5 at major authorized retailers.
Sony Alpha 7 III
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for travel, Alpha 7 III or FX5?
Alpha 7 III scores 8.5/10 versus 4.5/10 for FX5 — 650g — compact and travel-friendly.
What's the resolution difference between the Alpha 7 III and FX5?
Alpha 7 III is 24.2 MP and FX5 is 16.6 MP, so the Alpha 7 III captures more detail for cropping and large prints.
Do the Alpha 7 III and FX5 have in-body image stabilization?
Alpha 7 III has 5-stop in-body image stabilization, while FX5 has 5.5-stop in-body image stabilization.
What's the weight difference between the Alpha 7 III and FX5?
Alpha 7 III weighs 650 g and FX5 weighs 734 g, so the Alpha 7 III is 84 g lighter.
Do the Alpha 7 III and FX5 record 4K video?
Alpha 7 III: 4K up to 30p. FX5: 4K up to 120p.
Are the Alpha 7 III and FX5 weather sealed?
Alpha 7 III: Yes. FX5: Yes.
How much does each cost?
Alpha 7 III launched at $1,999 and FX5 at $4,899. The Alpha 7 III is $2,900 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Alpha 7 III vs FX5 vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Sony press materials.