Sigma
fp L
World's smallest full-frame interchangeable camera with 61MP and L-mount.
$2,499
Launch priceReleased Jul 2021
Sony
Alpha 7 IV
33MP hybrid all-rounder with 10-bit 4K 60p and AI-powered subject tracking.
$2,499
Launch priceReleased Oct 2021
Alpha 7 IV is 4 months newer.
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Wins
fp L
Wins
Alpha 7 IV
4 categories tied
Which would you choose?
TL;DR — Key differences
- BAlpha 7 IV has higher RAW buffer depth (828 frames vs 12 frames)
- BAlpha 7 IV has higher AF points / zones (759 vs 49)
- BAlpha 7 IV has higher Max video bit rate (600 Mbps vs 150 Mbps)
- BAlpha 7 IV has higher Battery life (CIPA) (580 shots vs 240 shots)
- BAlpha 7 IV has higher 4K max frame rate (60 fps vs 29.97 fps)
Key specs at a glance
Size and weight, to scale
📸 Snap this size diff to share
fp L
113 × 70 × 45 mm
427 g (0.94 lb / 15.06 oz)
Credit card
85.6 × 54 mm
for scale
Alpha 7 IV
131 × 96 × 80 mm
658 g (1.45 lb / 23.21 oz)
fp L is 19mm narrower, 27mm shorter, and 35mm thinner than Alpha 7 IV.
fp L is 231 g lighter than Alpha 7 IV.
Depth (front-to-back): 45mm fp L · 80mm Alpha 7 IV
Back view, to scale
Width × Height — same proportions as the front of the body.
fp L
113 × 70 mm
Credit card
85.6 × 54 mm
Alpha 7 IV
131 × 96 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
fp L
113 × 45 mm
Credit card
85.6 × 54 mm
Alpha 7 IV
131 × 80 mm
Sensor size, to scale
fp L
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 L: 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 L
AF low-light limit
-5 EV vs -4 EV — lower is better
Dimensions (W×H×D mm)
Adds 112.6, 69.9, 45.3
Card types
Adds SD, SDHC, SDXC
Codecs
Adds CinemaDNG, MOV
Pre-Capture / Pre-Release
Only fp L supports it
Resolution
61 MP vs 33 MP — higher is better
Weight
427 g vs 658 g — lower is better
Subject recognition
Adds Vehicle
Reasons to choose
Alpha 7 IV
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 12 frames — higher is better
AF points / zones
759 vs 49 — higher is better
Codecs
Adds XAVC HS, XAVC S, XAVC S-I…
Max video bit rate
600 Mbps vs 150 Mbps — higher is better
Battery life (CIPA)
580 shots vs 240 shots — higher is better
4K max frame rate
60 fps vs 29.97 fps — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Burst (electronic) — Both 10 fps
- ✓Internal RAW video — Both support internal raw video
Pros & cons at a glance
Editorially curated highlights and trade-offs.
fp L
Pros
- ✓Tiny full-frame
- ✓61MP
- ✓L-mount
- ✓Unique industrial design
Cons
- –No IBIS
- –Small battery
- –Minimal ergonomics
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 fp L and Alpha 7 IV at major authorized retailers.
Sigma fp L
Sony Alpha 7 IV
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, fp L or Alpha 7 IV?
Alpha 7 IV scores 7.5/10 versus 3.5/10 for fp L — 4K recording.
What's the resolution difference between the fp L and Alpha 7 IV?
fp L is 61 MP and Alpha 7 IV is 33 MP, so the fp L captures more detail for cropping and large prints.
Do the fp L and Alpha 7 IV have in-body image stabilization?
fp L does not have IBIS, while Alpha 7 IV has 5.5-stop in-body image stabilization.
Which shoots faster bursts — the fp L or the Alpha 7 IV?
fp L reaches 10 fps electronic. Alpha 7 IV reaches 10 fps electronic.
What's the weight difference between the fp L and Alpha 7 IV?
fp L weighs 427 g and Alpha 7 IV weighs 658 g, so the fp L is 231 g lighter.
Do the fp L and Alpha 7 IV record 4K video?
fp L: 4K up to 29.97p. Alpha 7 IV: 4K up to 60p.
Are the fp L and Alpha 7 IV weather sealed?
fp L: Yes. Alpha 7 IV: Yes.
Which has better battery life?
Rated battery life is 240 shots (CIPA) for the fp L and 580 shots for the Alpha 7 IV, giving the Alpha 7 IV the edge.
How much does each cost?
Both launched at $2,499.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way fp L vs Alpha 7 IV vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Sigma and Sony press materials.