Sony
Alpha 7 IV
33MP hybrid all-rounder with 10-bit 4K 60p and AI-powered subject tracking.
$2,499
Released Oct 2021
Sony
FX30
Super 35 cinema camera with 4K 120p and affordable entry to Sony Cinema Line.
$1,799
Released Sep 2022
FX30 is 11 months newer.
Wins
Alpha 7 IV
Wins
FX30
6 categories tied
TL;DR — Key differences
- AAlpha 7 IV has higher RAW buffer depth (828 frames vs 60 frames)
- BFX30 has higher 4K max frame rate (120 fps vs 60 fps)
- AAlpha 7 IV has higher ISO max (native) (51,200 vs 32,000)
- AAlpha 7 IV has higher AF points / zones (759 vs 495)
- AAlpha 7 IV has higher Resolution (33 MP vs 26 MP)
Key specs at a glance
Size and weight, to scale
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
FX30
130 × 78 × 85 mm
646 g (1.42 lb / 22.79 oz)
Alpha 7 IV is 5mm thinner than FX30 but it is also 2mm wider and 19mm taller.
Alpha 7 IV is 12 g heavier than FX30.
Depth (front-to-back): 80mm Alpha 7 IV · 85mm FX30
Sensor size, to scale
Alpha 7 IV
35.9 × 23.9 mm · Full Frame
858 mm² area
FX30
23.3 × 15.5 mm · APS-C
361 mm² area
2.4× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
Alpha 7 IV
✓ more lensesSony E
350+
native lenses available
FX30
✓ 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 IV
AF low-light limit
-4 EV vs -3 EV — lower is better
Dimensions (W×H×D mm)
Adds 131.3, 96.4, 79.8
RAW buffer depth
828 frames vs 60 frames — higher is better
Subject recognition
Adds Bird, Insect, Car/Train…
AA filter
Only Alpha 7 IV supports it
ISO max (native)
51,200 vs 32,000 — higher is better
AF points / zones
759 vs 495 — higher is better
Resolution
33 MP vs 26 MP — higher is better
Reasons to choose
FX30
Dimensions (W×H×D mm)
Adds 129.7, 77.8, 84.5
4K max frame rate
120 fps vs 60 fps — higher is better
Weight
646 g vs 658 g — lower is better
Both cameras share
- ✓ISO min (native) — Both 100
- ✓AF frame coverage — Both 94 %
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (mechanical) — Both 10 fps
- ✓Burst (electronic) — Both 10 fps
Pros & cons at a glance
Editorially curated highlights and trade-offs.
Alpha 7 IV
Pros
- ✓33MP — more detail for cropping and print
- ✓10-bit 4K 60p (Super35 crop) / 4K 30p full-frame
- ✓Full-size HDMI port
- ✓759 phase-detect AF points
Cons
- –4K 60p requires Super35 crop
- –10fps burst lags behind R6 II at 40fps
- –Complex menu system
FX30
Pros
- ✓4K 120p
- ✓Affordable cinema
- ✓Active cooling
- ✓Log profiles
Cons
- –Super 35 crop
- –26MP stills crop
- –No full-frame
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, Alpha 7 IV or FX30?
Alpha 7 IV scores 8.0/10 versus 4.5/10 for FX30 — Bird AF subject recognition.
What's the resolution difference between the Alpha 7 IV and FX30?
Alpha 7 IV is 33 MP and FX30 is 26 MP, so the Alpha 7 IV captures more detail for cropping and large prints.
Do the Alpha 7 IV and FX30 have in-body image stabilization?
Alpha 7 IV has 5.5-stop in-body image stabilization, while fX30 has 5-stop in-body image stabilization.
Which shoots faster bursts — the Alpha 7 IV or the FX30?
Alpha 7 IV reaches 10 fps electronic. FX30 reaches 10 fps electronic.
What's the weight difference between the Alpha 7 IV and FX30?
Alpha 7 IV weighs 658 g and FX30 weighs 646 g, so the FX30 is 12 g lighter.
Do the Alpha 7 IV and FX30 record 4K video?
Alpha 7 IV: 4K up to 60p. FX30: 4K up to 120p.
Are the Alpha 7 IV and FX30 weather sealed?
Alpha 7 IV: Yes. FX30: Yes.
Which has better battery life?
Rated battery life is 580 shots (CIPA) for the Alpha 7 IV and 570 shots for the FX30, giving the Alpha 7 IV the edge.
How much does each cost?
Alpha 7 IV launched at $2,499 and FX30 at $1,799. The FX30 is $700 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Sony press materials.