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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 RP — full-frame · 2019
Canon

Canon EOS RP

full-frame · 2019

80
/ 100
From $1,299
Specdex verdict

Dead heat — it comes down to priorities.

In our weighted Specdex score, Pentax K-3 Mark III lands at 80 and Canon EOS RP at 80. With scores tied, the decision hinges on which sub-scores matter most to you.

Pick Pentax K-3 Mark III if…

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

Pick Canon EOS RP if…

  • Mature system, great used market
  • Proven lens lineup
  • Often on sale
Pentax K-3 Mark III 80
vs
80 Canon EOS RP

Score breakdown

Pentax K-3 Mark III
80
photo 80
video 72
autofocus 76
ergonomics 86
Canon EOS RP
80
photo 80
video 72
autofocus 76
ergonomics 86

Specs side-by-side

Pentax K-3 Mark III versus Canon EOS RP — full spec comparison
Spec Pentax K-3 Mark III Canon EOS RP
Format
APS-C DSLR
full-frame
Release year
2021
2019

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 RP

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

FAQ: Pentax K-3 Mark III vs Canon EOS RP

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

Both score 80 on our weighted rubric — tied. 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 RP worth the price? +

At $1,299, Canon EOS RP delivers a Specdex score of 80 — strongest in ergonomics.

Does Pentax K-3 Mark III or Canon EOS RP 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.