Sigma
fp
Minimalist full-frame box camera for creative stills and video.
$1,899
Released Jul 2019
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 2.3 years newer.
Wins
fp
Wins
Alpha 7 IV
4 categories tied
TL;DR — Key differences
- BAlpha 7 IV has higher IBIS effectiveness (5.5 stops vs 0 stops)
- BAlpha 7 IV has higher AF points / zones (759 vs 49)
- BAlpha 7 IV has higher RAW buffer depth (828 frames vs 60 frames)
- BAlpha 7 IV has higher Max video bit rate (600 Mbps vs 150 Mbps)
- BAlpha 7 IV has higher ISO max (native) (51,200 vs 25,600)
Key specs at a glance
Size and weight, to scale
fp
138 × 98 × 88 mm
720 g (1.59 lb / 25.40 oz)
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
fp is 7mm wider, 2mm taller, and 8mm thicker than Alpha 7 IV.
fp is 62 g heavier than Alpha 7 IV.
Depth (front-to-back): 88mm fp · 80mm Alpha 7 IV
Sensor size, to scale
fp
36 × 24 mm · Full Frame
864 mm² area
Alpha 7 IV
35.9 × 23.9 mm · Full Frame
858 mm² area
Lens ecosystem
Native lens selection
fp: 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
fp
AF low-light limit
-5 EV vs -4 EV — lower is better
Dimensions (W×H×D mm)
Adds 138, 98, 88
Subject recognition
Adds Vehicle
Battery life (CIPA)
640 shots vs 580 shots — higher is better
Burst (electronic)
11 fps vs 10 fps — 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
AF points / zones
759 vs 49 — higher is better
RAW buffer depth
828 frames vs 60 frames — higher is better
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I
ISO max (native)
51,200 vs 25,600 — higher is better
Animal / bird AF
Only Alpha 7 IV supports it
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓4K max frame rate — Both 60 fps
- ✓EVF magnification — Both 0.78 ×
- ✓EVF refresh rate — Both 120 Hz
Pros & cons at a glance
Editorially curated highlights and trade-offs.
fp
Pros
- ✓Ultra compact
- ✓L-mount
- ✓Unique concept
Cons
- –No IBIS
- –24MP
- –Poor ergonomics for long shoots
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 landscape, fp or Alpha 7 IV?
Alpha 7 IV scores 7.5/10 versus 3.5/10 for fp — 33MP — ample resolution.
What's the resolution difference between the fp and Alpha 7 IV?
fp is 24.2 MP and Alpha 7 IV is 33 MP, so the Alpha 7 IV captures more detail for cropping and large prints.
Do the fp and Alpha 7 IV have in-body image stabilization?
fp does not have IBIS, while alpha 7 IV has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the fp or the Alpha 7 IV?
fp reaches 11 fps electronic. Alpha 7 IV reaches 10 fps electronic.
What's the weight difference between the fp and Alpha 7 IV?
fp weighs 720 g and Alpha 7 IV weighs 658 g, so the Alpha 7 IV is 62 g lighter.
Do the fp and Alpha 7 IV record 4K video?
fp: 4K up to 60p. Alpha 7 IV: 4K up to 60p.
Are the fp and Alpha 7 IV weather sealed?
fp: No. Alpha 7 IV: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the fp and 580 shots for the Alpha 7 IV, giving the fp the edge.
How much does each cost?
fp launched at $1,899 and Alpha 7 IV at $2,499. The fp is $600 less.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed May 2026.
Product images courtesy of Sigma and Sony press materials.