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Pentax K-3 Mark III — APS-C DSLR · 2021
Pentax

Pentax K-3 Mark III

APS-C DSLR · 2021

80
/ 100
From $1,999
VS
Canon EOS R5 Mark II wins by 15
Canon EOS R5 Mark II — full-frame · 2024
Canon

Canon EOS R5 Mark II

full-frame · 2024

95
/ 100
From $4,299
Specdex verdict

Canon EOS R5 Mark II takes it — here’s why.

In our weighted Specdex score, Pentax K-3 Mark III lands at 80 and Canon EOS R5 Mark II at 95. That puts Canon EOS R5 Mark II ahead by 15 points — a decisive margin driven mostly by its strengths in the categories below.

Pick Pentax K-3 Mark III if…

  • ✓Mature system, great used market
  • ✓Proven lens lineup
  • ✓Often on sale

Pick Canon EOS R5 Mark II if…

  • ✓Current-gen AF system
  • ✓Proven lens ecosystem
  • ✓Strong video + stills balance
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Winner by scenario

Derived from the sub-score breakdown · not a separate test

Photo

Canon EOS R5 Mark II

Compared on the photo sub-score

Canon EOS R5 Mark II leads on photo (95 vs 80).

Ergonomics

Tie

Compared on the ergonomics sub-score

Effectively tied — neither pulls a 2-point weighted lead.

Autofocus

Canon EOS R5 Mark II

Compared on the autofocus sub-score

Canon EOS R5 Mark II leads on autofocus (93 vs 76).

Value for money

Pentax K-3 Mark III

Specdex score per dollar at MSRP

Pentax K-3 Mark III more score per dollar ($1,999 vs $4,299).

Pentax K-3 Mark III 80
vs
95 Canon EOS R5 Mark II

Score breakdown

Pentax K-3 Mark III
80
photo 80
video 72
autofocus 76
ergonomics 86
Canon EOS R5 Mark II
95
photo 95
video 91
autofocus 93
ergonomics 86

Specs side-by-side

Pentax K-3 Mark III versus Canon EOS R5 Mark II — full spec comparison
Spec Pentax K-3 Mark III Canon EOS R5 Mark II
Format
APS-C DSLR
full-frame
Release year
2021
2024

Pentax K-3 Mark III

Pros
  • +Mature system, great used market
  • +Proven lens lineup
  • +Often on sale
Cons
  • −Older AF system
  • −Heavier than modern mirrorless
  • −Firmware updates trailed off

Canon EOS R5 Mark II

Pros
  • +Current-gen AF system
  • +Proven lens ecosystem
  • +Strong video + stills balance
Cons
  • −Body price excludes lens
  • −Heavy for travel (flagship)
  • −Learning curve on menus

FAQ: Pentax K-3 Mark III vs Canon EOS R5 Mark II

Which is better, Pentax K-3 Mark III or Canon EOS R5 Mark II? +

Canon EOS R5 Mark II scores 95 on our weighted rubric — ahead by 15. Your best pick depends on the sub-scores above.

Is Pentax K-3 Mark III worth the price? +

At $1,999, Pentax K-3 Mark III delivers a Specdex score of 80 — strongest in ergonomics.

Is Canon EOS R5 Mark II worth the price? +

At $4,299, Canon EOS R5 Mark II delivers a Specdex score of 95 — strongest in photo.

Does Pentax K-3 Mark III or Canon EOS R5 Mark II last longer? +

Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.

Which is better for photo, Pentax K-3 Mark III or Canon EOS R5 Mark II? +

Canon EOS R5 Mark II — leads on photo (95 vs 80). Compared on the photo sub-score.

Which is better for autofocus, Pentax K-3 Mark III or Canon EOS R5 Mark II? +

Canon EOS R5 Mark II — leads on autofocus (93 vs 76). Compared on the autofocus sub-score.