Pentax SMC K 135 mm f/ 2.5 Lens

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Pictures

Optical design

Format: 35mm SLR

Type: Prime lens

Focusing: Manual Focus (MF)

Lens mounts: Pentax K

First year of production: 1975

Last year of production: 1985

Optical design: 6 elements in 6 groups

User reviews (1)

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Owners (2)

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Average price: $317

Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
135mm	f/2.5	f/32	8	1.5	58	500/17,6	86/3,4

Additional information:

The PentaxSMC K 135 mm f/ 2.5 is a telephoto prime lens with a proprietary multicoating for 35 mm SLR Pentax K cameras.

Links to online resources:

Bojidar Dimitrov's Pentax K-Mount Page

Posted by: Eugeny Date of publication: 25.08.2011

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Owner reviews: Pentax SMC K 135 mm f/ 2.5

Leo Koikov 23.01.2018 02:48:12

Period of use: 1 month

Strengths:

Sharpness wide open

Color and contrast

Weaknesses:

500g (but balances pretty well)

No Manual-Auto switch on my copy, so the pin does not allow changing aperture on digital body w/o modifications: https://www.pentaxforums.com/forums/10-pentax-slr-lens-discussion/308154-asahi-smc-takumar-135mm-2-5-m42.html

Comments:

I've got an earlier SMC PENTAX 1:2.5/135 version (1975-1977) as opposed to smc PENTAX 1:2.5/135 (1977-1985). Both versions are considered the sharpest wide open 135mm lense ever made with excellent color reproduction. It surpasses Super-Multi-Coated Takumar 1:2.5 135mm (M42).

135mm Lens War: http://oomz.net/135/

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