Sony
Alpha 7 IV
33MP hybrid all-rounder with 10-bit 4K 60p and AI-powered subject tracking.
$2,499
Released Oct 2021
Alpha 7 IV is 9 months newer.
Wins
GFX100S
Wins
Alpha 7 IV
3 categories tied
TL;DR — Key differences
- BAlpha 7 IV has higher RAW buffer depth (828 frames vs 23 frames)
- BAlpha 7 IV has higher ISO max (native) (51,200 vs 12,800)
- BAlpha 7 IV has higher Burst (electronic) (10 fps vs 2.9 fps)
- AGFX100S has higher Resolution (102 MP vs 33 MP)
- BAlpha 7 IV has higher Burst (mechanical) (10 fps vs 5 fps)
Key specs at a glance
Size and weight, to scale
GFX100S
150 × 104 × 87 mm
900 g (1.98 lb / 31.75 oz)
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
GFX100S is 19mm wider, 8mm taller, and 7mm thicker than Alpha 7 IV.
GFX100S is 242 g heavier than Alpha 7 IV.
Depth (front-to-back): 87mm GFX100S · 80mm Alpha 7 IV
Sensor size, to scale
GFX100S
43.8 × 32.9 mm · Medium Format
1441 mm² area
Alpha 7 IV
35.9 × 23.9 mm · Full Frame
858 mm² area
1.7× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
GFX100S: mount data unavailable
Alpha 7 IV
✓ 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
GFX100S
Dimensions (W×H×D mm)
Adds 150, 104.2, 87.2
Resolution
102 MP vs 33 MP — higher is better
Card types
Adds SDXC V90
IBIS effectiveness
6 stops vs 5.5 stops — higher is better
AF frame coverage
100 % vs 94 % — higher is better
EVF resolution
3,690,000 vs 3,686,400 — higher is better
Reasons to choose
Alpha 7 IV
Subject recognition
Adds Human, Animal, Bird…
Dimensions (W×H×D mm)
Adds 131.3, 96.4, 79.8
RAW buffer depth
828 frames vs 23 frames — higher is better
ISO max (native)
51,200 vs 12,800 — higher is better
Burst (electronic)
10 fps vs 2.9 fps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
AA filter
Only Alpha 7 IV supports it
Animal / bird AF
Only Alpha 7 IV supports it
Both cameras share
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓In-body stabilization — Both support in-body stabilization
- ✓Weather sealing — Both support weather sealing
- ✓Card slots — Both 2
- ✓EVF refresh rate — Both 120 Hz
Pros & cons at a glance
Editorially curated highlights and trade-offs.
GFX100S
Pros
- ✓102MP
- ✓IBIS
- ✓Medium format quality
Cons
- –Price
- –Slow AF
- –Huge files
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
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, GFX100S or Alpha 7 IV?
Alpha 7 IV scores 8.0/10 versus 1.5/10 for GFX100S — Bird AF subject recognition.
What's the resolution difference between the GFX100S and Alpha 7 IV?
GFX100S is 102 MP and Alpha 7 IV is 33 MP, so the GFX100S captures more detail for cropping and large prints.
Do the GFX100S and Alpha 7 IV have in-body image stabilization?
GFX100S has 6-stop in-body image stabilization, while alpha 7 IV has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the GFX100S or the Alpha 7 IV?
GFX100S reaches 5 fps mechanical. Alpha 7 IV reaches 10 fps electronic.
What's the weight difference between the GFX100S and Alpha 7 IV?
GFX100S weighs 900 g and Alpha 7 IV weighs 658 g, so the Alpha 7 IV is 242 g lighter.
Do the GFX100S and Alpha 7 IV record 4K video?
GFX100S: 4K up to 30p. Alpha 7 IV: 4K up to 60p.
Are the GFX100S and Alpha 7 IV weather sealed?
GFX100S: Yes. Alpha 7 IV: Yes.
Which has better battery life?
Rated battery life is 460 shots (CIPA) for the GFX100S and 580 shots for the Alpha 7 IV, giving the Alpha 7 IV the edge.
How much does each cost?
GFX100S launched at $5,999 and Alpha 7 IV at $2,499. The Alpha 7 IV is $3,500 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Fujifilm and Sony press materials.