Sony
Alpha 7S II
12MP low-light video pioneer before the A7S III revolution.
$2,999
Launch priceReleased Sep 2015
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 10.9 years newer.
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Wins
Alpha 7S II
Wins
FX5
4 categories tied
Which would you choose?
TL;DR — Key differences
- AAlpha 7S II has higher Burst (mechanical) (5 fps vs 0 fps)
- AAlpha 7S II has higher Burst (electronic) (5 fps vs 0 fps)
- AAlpha 7S II has lower ISO min (native) (100 vs 800)
- AAlpha 7S II has higher ISO max (native) (102,400 vs 12,800)
- BFX5 has higher AF points / zones (759 vs 169)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to shareAlpha 7S II
127 × 96 × 60 mm
627 g (1.38 lb / 22.12 oz)
Credit card
85.6 × 54 mm
for scale
FX5
132 × 79 × 87 mm
734 g (1.62 lb / 25.89 oz)
Alpha 7S II is 5mm narrower and 27mm thinner than FX5 but it is also 17mm taller.
Alpha 7S II is 107 g lighter than FX5.
Depth (front-to-back): 60mm Alpha 7S II · 87mm FX5
Back view, to scale
Width × Height — same proportions as the front of the body.
Alpha 7S II
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 7S II
127 × 60 mm
Credit card
85.6 × 54 mm
FX5
132 × 87 mm
Sensor size, to scale
Alpha 7S II
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 7S II
✓ 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 7S II
Burst (mechanical)
5 fps vs 0 fps — higher is better
Burst (electronic)
5 fps vs 0 fps — higher is better
Dimensions (W×H×D mm)
Adds 126.9, 95.7, 60.3
Card types
Adds SD UHS-I
ISO min (native)
100 vs 800 — lower is better
ISO max (native)
102,400 vs 12,800 — higher is better
Codecs
Adds AVCHD, MP4
Weight
627 g vs 734 g — lower is better
Reasons to choose
FX5
AF low-light limit
-6 EV vs -4 EV — lower is better
Dimensions (W×H×D mm)
Adds 132.3, 79, 86.95
Card types
Adds CFexpress Type A, SD UHS-II
AF points / zones
759 vs 169 — higher is better
4K max frame rate
120 fps vs 30 fps — higher is better
Codecs
Adds X-OCN LT, X-OCN C1, X-OCN C2…
Subject recognition
Adds Animal, Bird
EVF resolution
7,070,000 vs 2,359,296 — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓RAW buffer depth — Both 120 frames
- ✓Max video bit rate — Both 200 Mbps
- ✓In-body stabilization (IBIS) — Both support in-body stabilization (ibis)
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 7S II
Pros
- ✓Legendary low light
- ✓4K internal
- ✓Compact files
Cons
- –12MP stills limit
- –Old AF
- –8-bit 4K
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 7S II and FX5 at major authorized retailers.
Sony Alpha 7S II
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for sports, Alpha 7S II or FX5?
FX5 scores 6.5/10 versus 1.5/10 for Alpha 7S II — 759 AF points — good coverage.
What's the resolution difference between the Alpha 7S II and FX5?
Alpha 7S II is 12.2 MP and FX5 is 16.6 MP, so the FX5 captures more detail for cropping and large prints.
Do the Alpha 7S II and FX5 have in-body image stabilization?
Alpha 7S II has 4.5-stop in-body image stabilization, while FX5 has 5.5-stop in-body image stabilization.
What's the weight difference between the Alpha 7S II and FX5?
Alpha 7S II weighs 627 g and FX5 weighs 734 g, so the Alpha 7S II is 107 g lighter.
Do the Alpha 7S II and FX5 record 4K video?
Alpha 7S II: 4K up to 30p. FX5: 4K up to 120p.
Are the Alpha 7S II and FX5 weather sealed?
Alpha 7S II: Yes. FX5: Yes.
How much does each cost?
Alpha 7S II launched at $2,999 and FX5 at $4,899. The Alpha 7S II is $1,900 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way Alpha 7S II 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.