Best telephoto prime lenses for Pentax K: Top Picks

Our catalogue lists 94 telephoto prime lenses for Pentax K. Fixed-focal-length lenses of 135mm and longer.

How these were picked. Lenses are ranked using only data in our catalogue: those with editorial notes first, then those with a photo and a buying link, newer release years where known, and faster maximum apertures as a tie-breaker. This is a data-based shortlist, not a hands-on test ranking.

1.Pentax smc DA* 200mm F2.8 ED (IF) SDM

200mm · f/2.8 · Pentax K

A bright 200mm prime for Pentax APS-C bodies with SDM focusing. It weighs about 825 g, takes 77mm filters and has a 9-bladed aperture.

Specs Buy on Amazon Compare with smc DA* 300mm F4.0 ED (IF) SDM
2.Pentax smc DA* 300mm F4.0 ED (IF) SDM

300mm · f/4.0 · Pentax K

A 300mm f/4 telephoto prime for Pentax APS-C bodies with SDM focusing. It weighs about 1,070 g and takes 77mm filters.

Specs Compare with Takumar 135mm f/2.5 Bayonet
3.Pentax Takumar 135mm f/2.5 Bayonet

135mm · f/2.5 · Pentax K

A 135mm f/2.5 short-telephoto prime lens, the Pentax Takumar 135mm f/2.5 Bayonet is designed for Pentax K mount bodies. A classic Takumar lens from the Pentax screw-mount era, popular for vintage-lens adapting.

Specs Compare with 200mm f/3 Auto Telephoto
4.Vivitar 200mm f/3 Auto Telephoto

200mm · f/3.0 · Pentax K

This 200mm f/3 telephoto prime lens from Vivitar fits Pentax K mount cameras. It brings distant subjects closer for sports, wildlife and events.

Specs Compare with smc Pentax-K 135mm f/3.5
5.Pentax smc Pentax-K 135mm f/3.5

135mm · f/3.5 · Pentax K

Pentax smc Pentax-K 135mm f/3.5: a short-telephoto prime lens with a 135mm focal length and a maximum aperture of f/3.5, made for Pentax K mount cameras. The focal length is a classic choice for portraits and details.

Specs Compare with smc Pentax-M 135mm f/3.5
6.Pentax smc Pentax-M 135mm f/3.5

135mm · f/3.5 · Pentax K

A 135mm f/3.5 short-telephoto prime lens, the Pentax smc Pentax-M 135mm f/3.5 is designed for Pentax K mount bodies. The focal length is a classic choice for portraits and details.

Specs Compare with SP AF 180mm f/3.5 Di LD [IF] Macro 1:1
7.Tamron SP AF 180mm f/3.5 Di LD [IF] Macro 1:1

180mm · f/3.5 · Pentax K

This 180mm f/3.5 full-frame macro lens from Tamron fits Pentax K mount cameras, from the Tamron SP series. It is intended for close-up work with small subjects such as flowers and insects.

Specs Compare with 500mm f/6.3 Mirror
8.Samyang 500mm f/6.3 Mirror

500mm · f/6.3 · Pentax K

Samyang 500mm f/6.3 Mirror: a mirror telephoto lens with a 500mm focal length and a maximum aperture of f/6.3, made for Pentax K mount cameras. Its catadioptric design keeps a long focal length compact and light.

Specs Compare with 500mm f/8 Mirror Adaptall-2
9.Tamron 500mm f/8 Mirror Adaptall-2

500mm · f/8.0 · Pentax K

The Tamron 500mm f/8 Mirror Adaptall-2 is a mirror telephoto lens covering 500mm at f/8 for Pentax K mount cameras. Its catadioptric design keeps a long focal length compact and light.

Specs Compare with SP 500mm f/8 Mirror Adaptall-2
10.Tamron SP 500mm f/8 Mirror Adaptall-2

500mm · f/8.0 · Pentax K

This 500mm f/8 mirror telephoto lens from Tamron fits Pentax K mount cameras, from the Tamron SP series. Its catadioptric design keeps a long focal length compact and light.

Specs Compare with 600mm f/8 Solid Cat
11.Vivitar 600mm f/8 Solid Cat

600mm · f/8.0 · Pentax K

A 600mm f/8 mirror telephoto lens, the Vivitar 600mm f/8 Solid Cat is designed for Pentax K mount bodies. Its catadioptric design keeps a long focal length compact and light.

Specs Compare with smc Pentax-DA* 200mm f/2.8 ED [IF] SDM
12.Pentax smc Pentax-DA* 200mm f/2.8 ED [IF] SDM

200mm · f/2.8 · Pentax K

This 200mm f/2.8 telephoto prime lens from Pentax fits Pentax K mount cameras, with extra-low dispersion glass. A premium weather-resistant "Star" series lens for Pentax K-mount cameras.

Specs Buy on Amazon