Fujifilm
GFX100RF
Fixed-lens 102MP medium format rangefinder-style camera with a 35mm f/4 lens and built-in ND filter.
$4,899
Released Mar 2025
Sony
Alpha 7 IV
33MP hybrid all-rounder with 10-bit 4K 60p and AI-powered subject tracking.
$2,499
Released Oct 2021
GFX100RF is 3.4 years newer.
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Wins
GFX100RF
Wins
Alpha 7 IV
1 categories tied
TL;DR — Key differences
- BAlpha 7 IV has higher IBIS effectiveness (5.5 stops vs 0 stops)
- BAlpha 7 IV has higher RAW buffer depth (828 frames vs 45 frames)
- BAlpha 7 IV has higher ISO max (native) (51,200 vs 12,800)
- BAlpha 7 IV has higher Burst (electronic) (10 fps vs 3 fps)
- AGFX100RF has higher Resolution (102 MP vs 33 MP)
Key specs at a glance
Size and weight, to scale
GFX100RF
134 × 90 × 77 mm
735 g (1.62 lb / 25.93 oz)
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
GFX100RF is 6mm shorter and 3mm thinner than Alpha 7 IV but it is also 2mm wider.
GFX100RF is 77 g heavier than Alpha 7 IV.
Depth (front-to-back): 77mm GFX100RF · 80mm Alpha 7 IV
Sensor size, to scale
GFX100RF
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
GFX100RF: 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
GFX100RF
Dimensions (W×H×D mm)
Adds 133.5, 90.4, 76.5
Resolution
102 MP vs 33 MP — higher is better
Card types
Adds SDXC V90, SSD via USB
Codecs
Adds Apple ProRes 422 HQ, Apple ProRes 422, Apple ProRes 422 LT
Subject recognition
Adds Automobile, Motorcycle/Bike, Train
EVF resolution
5,760,000 vs 3,686,400 — higher is better
Battery life (CIPA)
820 shots vs 580 shots — higher is better
ISO min (native)
80 vs 100 — lower is better
Reasons to choose
Alpha 7 IV
AF low-light limit
-4 EV vs -3 EV — lower is better
IBIS effectiveness
5.5 stops vs 0 stops — higher is better
Dimensions (W×H×D mm)
Adds 131.3, 96.4, 79.8
RAW buffer depth
828 frames vs 45 frames — higher is better
ISO max (native)
51,200 vs 12,800 — higher is better
Burst (electronic)
10 fps vs 3 fps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
AA filter
Only Alpha 7 IV supports it
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Weather sealing — Both support weather sealing
- ✓Card slots — Both 2
- ✓Touchscreen — Both support touchscreen
- ✓Wi-Fi — Both support wi-fi
Pros & cons at a glance
Editorially curated highlights and trade-offs.
GFX100RF
Pros
- ✓102MP medium format image quality
- ✓Compact fixed-lens GFX design
- ✓Built-in 4-stop ND
- ✓High-resolution EVF
Cons
- –Fixed 35mm f/4 lens
- –No IBIS
- –Premium niche camera
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
Decided which one is right for you?
Compare live prices for the GFX100RF and Alpha 7 IV at major authorized retailers.
Fujifilm GFX100RF
Sony Alpha 7 IV
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for vlogging, GFX100RF or Alpha 7 IV?
Alpha 7 IV scores 8.0/10 versus 3.0/10 for GFX100RF — Fully articulating screen — see yourself while filming.
What's the resolution difference between the GFX100RF and Alpha 7 IV?
GFX100RF is 102 MP and Alpha 7 IV is 33 MP, so the GFX100RF captures more detail for cropping and large prints.
Do the GFX100RF and Alpha 7 IV have in-body image stabilization?
GFX100RF does not have IBIS, while alpha 7 IV has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the GFX100RF or the Alpha 7 IV?
GFX100RF reaches 6 fps mechanical. Alpha 7 IV reaches 10 fps electronic.
What's the weight difference between the GFX100RF and Alpha 7 IV?
GFX100RF weighs 735 g and Alpha 7 IV weighs 658 g, so the Alpha 7 IV is 77 g lighter.
Do the GFX100RF and Alpha 7 IV record 4K video?
GFX100RF: 4K up to 30p. Alpha 7 IV: 4K up to 60p.
Are the GFX100RF and Alpha 7 IV weather sealed?
GFX100RF: Yes. Alpha 7 IV: Yes.
Which has better battery life?
Rated battery life is 820 shots (CIPA) for the GFX100RF and 580 shots for the Alpha 7 IV, giving the GFX100RF the edge.
How much does each cost?
GFX100RF launched at $4,899 and Alpha 7 IV at $2,499. The Alpha 7 IV is $2,400 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Fujifilm and Sony press materials.