[gjtoth]

I'm about to switch platforms from my Olympus E-620 to a K-r. I know nothing about the lenses but I'm a quick learner How can tell which lenses are compatible with the K-r? I assume there is some sort of letter(s) designation to distinguish the newer lenses from the older, legacy lenses?

[macTak]

Here's the best source for a primer on what you need to know:

Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

Don't forget this forum has a database of Pentax and third-party lenes, both current and older, with reviews and information:
Pentax Reviews - Pentax Lens Reviews & Pentax Lens Database
Third-Party Lenses for Pentax - Pentax Third-Party Lens Review Database

[jellyfish26]

heres a great link explaining different types of Pentax lenses
Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

Some older lenses may need an adapter to attach to the body, but DA,FA,F,A,M,K all work without one

[gjtoth]

Here's the best source for a primer on what you need to know:

Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

Don't forget this forum has a database of Pentax and third-party lenes, both current and older, with reviews and information:
Pentax Reviews - Pentax Lens Reviews & Pentax Lens Database
Third-Party Lenses for Pentax - Pentax Third-Party Lens Review Database

heres a great link explaining different types of Pentax lenses
Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

Some older lenses may need a mount to attach to the body, but DA,FA,F,A,M,K all work without one

Many thanks to both of you. I just needed the quick & dirty for right now.

[joe.penn]

Almost every lens ever made for pentax will be compatible with your camera. Some will have more features that interact with the different bodies than others.

Manual focus
K - K2, KX, KM, K1000, K1000 SE
K - ME, ME SE, ME Super, ME Super SE, MG, MV, MV1, MX
K - LX
KA - Super A, Program A, A3
KA - P3, P5, P30, P30n, P30t
KA2 - MZ-M

Auto focus
KF - ME F
KAF - SFX, SFXn, SF7, MZ-6, MZ-7
KAF2 - Z-1, Z-5, Z-10, Z-20, Z-50, Z-70
KAF2 - MZ-S, MZ-3, MZ-5, MZ-5n, MZ-10
"crippled" KAF - MZ-30, MZ-50, MZ-60, *istD, *istDS(2), *istDL(2), K100D, K110D
"crippled" KAF2 - K10D, K100D Super, K20D, K200D, K2000 (K-m), K-7, K-x, K-r, K-5

All of the above, plus the M42 Screw Mounts (with the adapter) will mount to the KR - we are almost limitless on the Pentax side of the grass

Also, spin off's of the K-Mount like the Ricoh Mount will also work, Sears mounts (which is the Ricoh mount), and others...

[gjtoth]

Almost every lens ever made for pentax will be compatible with your camera. Some will have more features that interact with the different bodies than others.

Manual focus
K - K2, KX, KM, K1000, K1000 SE
K - ME, ME SE, ME Super, ME Super SE, MG, MV, MV1, MX
K - LX
KA - Super A, Program A, A3
KA - P3, P5, P30, P30n, P30t
KA2 - MZ-M

Auto focus
KF - ME F
KAF - SFX, SFXn, SF7, MZ-6, MZ-7
KAF2 - Z-1, Z-5, Z-10, Z-20, Z-50, Z-70
KAF2 - MZ-S, MZ-3, MZ-5, MZ-5n, MZ-10
"crippled" KAF - MZ-30, MZ-50, MZ-60, *istD, *istDS(2), *istDL(2), K100D, K110D
"crippled" KAF2 - K10D, K100D Super, K20D, K200D, K2000 (K-m), K-7, K-x, K-r, K-5

All of the above, plus the M42 Screw Mounts (with the adapter) will mount to the KR - we are almost limitless on the Pentax side of the grass

Also, spin off's of the K-Mount like the Ricoh Mount will also work, Sears mounts (which is the Ricoh mount), and others...

Thanks very much. That helps a lot.

[jackiecmc]

Thanks to the OP for the topic and for all the links. I'm a newbie too.

[SteveUK]

And for cheaper versions of the modern Pentax lenses, keep an eye out for Samsung lenses, they are the same lenses rebadged.