Pentax
K-1
Original 36MP full-frame Pentax DSLR with 5-axis SR, AA filter simulator, and weather sealing.
$1,799
Launch priceReleased Apr 2016
Sigma
fp L
World's smallest full-frame interchangeable camera with 61MP and L-mount.
$2,499
Launch priceReleased Jul 2021
fp L is 5.2 years newer.
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Wins
K-1
Wins
fp L
5 categories tied
Which would you choose?
TL;DR — Key differences
- AK-1 has higher RAW buffer depth (120 frames vs 12 frames)
- AK-1 has higher Battery life (CIPA) (640 shots vs 240 shots)
- Bfp L has lower Weight (427 g vs 1010 g)
- AK-1 has higher AF points / zones (101 vs 49)
- AK-1 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 shareK-1
137 × 111 × 87 mm
1010 g (2.23 lb / 35.63 oz)
Credit card
85.6 × 54 mm
for scale
fp L
113 × 70 × 45 mm
427 g (0.94 lb / 15.06 oz)
K-1 is 24mm wider, 41mm taller, and 41mm thicker than fp L.
K-1 is 583 g heavier than fp L.
Depth (front-to-back): 87mm K-1 · 45mm fp L
Back view, to scale
Width × Height — same proportions as the front of the body.
K-1
137 × 111 mm
Credit card
85.6 × 54 mm
fp L
113 × 70 mm
Top view, to scale
Width × Depth (front-to-back) — see which body is chunkier on the table.
K-1
137 × 87 mm
Credit card
85.6 × 54 mm
fp L
113 × 45 mm
Sensor size, to scale
K-1
35.9 × 24 mm · Full Frame
862 mm² area
fp L
36 × 24 mm · Full Frame
864 mm² area
Lens ecosystem
Native lens selection
K-1
✓ more lensesPentax K
70+
native lenses available
fp L: mount data unavailable
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
K-1
Dimensions (W×H×D mm)
Adds 137, 110.5, 86.5
Card types
Adds SD UHS-II
RAW buffer depth
120 frames vs 12 frames — higher is better
Battery life (CIPA)
640 shots vs 240 shots — higher is better
AF points / zones
101 vs 49 — higher is better
4K max frame rate
60 fps vs 29.97 fps — higher is better
Burst (electronic)
20 fps vs 10 fps — higher is better
Codecs
Adds H.265
Reasons to choose
fp L
AF low-light limit
-5 EV vs -3 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
Weight
427 g vs 1010 g — lower is better
Internal RAW video
Only fp L supports it
Resolution
61 MP vs 36.4 MP — higher is better
IBIS effectiveness
6 stops vs 5 stops — higher is better
Both cameras share
- ✓AA filter — Both support aa filter
- ✓ISO min (native) — Both 100
- ✓ISO max (native) — Both 25,600
- ✓Eye AF — Both support eye af
- ✓Animal / bird AF — Both support animal / bird af
- ✓Pre-Capture / Pre-Release — Both support pre-capture / pre-release
Pros & cons at a glance
Editorially curated highlights and trade-offs.
K-1
Pros
- ✓36MP full-frame
- ✓IBIS in DSLR
- ✓AA filter simulator
- ✓Weather sealed
Cons
- –Slow AF vs mirrorless
- –Heavy
- –Superseded by K-1 II
fp L
Pros
- ✓Tiny full-frame
- ✓61MP
- ✓L-mount
- ✓Unique industrial design
Cons
- –No IBIS
- –Small battery
- –Minimal ergonomics
Decided which one is right for you?
Compare live prices for the K-1 and fp L at major authorized retailers.
Pentax K-1
Sigma fp L
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Full specifications
✓ = category winner
Frequently asked
Quick answers generated from verified specs.
Which is better for video, K-1 or fp L?
K-1 scores 6.0/10 versus 3.5/10 for fp L — 4K recording.
What's the resolution difference between the K-1 and fp L?
K-1 is 36.4 MP and fp L is 61 MP, so the fp L captures more detail for cropping and large prints.
Do the K-1 and fp L have in-body image stabilization?
K-1 has 5-stop in-body image stabilization, while fp L does not have IBIS.
Which shoots faster bursts — the K-1 or the fp L?
K-1 reaches 20 fps electronic. fp L reaches 10 fps electronic.
What's the weight difference between the K-1 and fp L?
K-1 weighs 1010 g and fp L weighs 427 g, so the fp L is 583 g lighter.
Do the K-1 and fp L record 4K video?
K-1: 4K up to 60p. fp L: 4K up to 29.97p.
Are the K-1 and fp L weather sealed?
K-1: Yes. fp L: Yes.
Which has better battery life?
Rated battery life is 640 shots (CIPA) for the K-1 and 240 shots for the fp L, giving the K-1 the edge.
How much does each cost?
K-1 launched at $1,799 and fp L at $2,499. The K-1 is $700 less.
Can't decide between two? Compare a third camera.
Add any camera to get a three-way K-1 vs fp L vs X comparison.
Specs sourced from manufacturer data. Use-case scores algorithmically derived. Last reviewed July 2026.
Product images courtesy of Pentax and Sigma press materials.