Fujifilm
X100S
Second-generation X100 with 16MP X-Trans sensor and fixed 35mm-equivalent lens.
$1,299
Released Jan 2013
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 8.8 years newer.
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Wins
X100S
Wins
Alpha 7 IV
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 8 frames)
- BAlpha 7 IV has higher Max video bit rate (600 Mbps vs 36 Mbps)
- BAlpha 7 IV has higher ISO max (native) (51,200 vs 6,400)
- BAlpha 7 IV has higher Resolution (33 MP vs 16.3 MP)
Key specs at a glance
Size and weight, to scale
X100S
127 × 74 × 54 mm
445 g (0.98 lb / 15.70 oz)
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
X100S is 5mm narrower, 22mm shorter, and 26mm thinner than Alpha 7 IV.
X100S is 213 g lighter than Alpha 7 IV.
Depth (front-to-back): 54mm X100S · 80mm Alpha 7 IV
Sensor size, to scale
X100S
23.6 × 15.6 mm · APS-C
368 mm² area
Alpha 7 IV
35.9 × 23.9 mm · Full Frame
858 mm² area
2.3× larger sensor area = shallower depth of field and better low-light performance.
Lens ecosystem
Native lens selection
X100S: 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
X100S
Dimensions (W×H×D mm)
Adds 126.5, 74.4, 53.9
Card types
Adds SD UHS-I
Weight
445 g vs 658 g — lower is better
AF frame coverage
100 % vs 94 % — higher is better
Reasons to choose
Alpha 7 IV
IBIS effectiveness
5.5 stops vs 0 stops — higher is better
Dimensions (W×H×D mm)
Adds 131.3, 96.4, 79.8
Card types
Adds CFexpress Type A, SD UHS-II
RAW buffer depth
828 frames vs 8 frames — higher is better
Max video bit rate
600 Mbps vs 36 Mbps — higher is better
ISO max (native)
51,200 vs 6,400 — higher is better
Subject recognition
Adds Animal, Bird, Insect…
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
Both cameras share
- ✓Eye AF — Both support eye af
- ✓Touchscreen — Both support touchscreen
Pros & cons at a glance
Editorially curated highlights and trade-offs.
X100S
Pros
- ✓Classic fixed-lens design
- ✓X-Trans sensor
- ✓Hybrid viewfinder
Cons
- –Very old AF
- –No 4K
- –Fixed screen
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 X100S and Alpha 7 IV at major authorized retailers.
Fujifilm X100S
Sony Alpha 7 IV
Affiliate disclosure: As an Amazon Associate, Cameraegg earns from qualifying purchases. Cameraegg may also earn commission from B&H links, at no extra cost to you.
Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for wildlife, X100S or Alpha 7 IV?
Alpha 7 IV scores 8.0/10 versus 0.0/10 for X100S — Bird AF subject recognition.
What's the resolution difference between the X100S and Alpha 7 IV?
X100S is 16.3 MP and Alpha 7 IV is 33 MP, so the Alpha 7 IV captures more detail for cropping and large prints.
Do the X100S and Alpha 7 IV have in-body image stabilization?
X100S does not have IBIS, while alpha 7 IV has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the X100S or the Alpha 7 IV?
X100S reaches 6 fps electronic. Alpha 7 IV reaches 10 fps electronic.
What's the weight difference between the X100S and Alpha 7 IV?
X100S weighs 445 g and Alpha 7 IV weighs 658 g, so the X100S is 213 g lighter.
Do the X100S and Alpha 7 IV record 4K video?
X100S: Full HD. Alpha 7 IV: 4K up to 60p.
Are the X100S and Alpha 7 IV weather sealed?
X100S: No. Alpha 7 IV: Yes.
Which has better battery life?
Rated battery life is 330 shots (CIPA) for the X100S and 580 shots for the Alpha 7 IV, giving the Alpha 7 IV the edge.
How much does each cost?
X100S launched at $1,299 and Alpha 7 IV at $2,499. The X100S is $1,200 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Fujifilm and Sony press materials.