K 2000/13.5 Reflex

K 2000/13.5 Reflex

General Description

As I am not familiar with any tests or descriptions by people who have actually used this lens, I need to do some "educated guesses." My imagine then that using this large and heavy lens is a real challenge: finding a suitable tripod for it, carrying the tripod and the lens around, focusing on distant subjects using such a narrow aperture, striving to eliminate vibrations and shooting super-fast film are all difficult things. But when they are all combined together, the challenge is even greater. On the other hand, this lens or its successor (the absolutely identical M 2000/13.5) have been in Pentax’s lineup since 1979.

The lens offers two rear filter holders, one for use with color filters and one for use with neutral-density filters.

Product Information
Exact Name smc PENTAX REFLEX 1:13.5 2000mm
Color black
Year of Introduction 1979
Catalog Number 24980
Sold with Hood built-in hood
Sold with Case dedicated trunk: no name

Technical Specifications

Optical Formula 6 elements in 4 groups
Aperture Range f/13.5 ~ f/13.5
Minimum Focusing Distance 20.0 m
Maximum Magnification 0.12 X
Special Features reflex lens
Front-Filter Thread no
Rear-Filter Diameter 52 mm
Maximum Diameter 180 mm
Length 530 mm
Weight 8000 g
Special Features tripod collar
Cap hard leather slip-on cap, 181 mm
Fitting Hood(s) built-in hood
Fitting Case(s) dedicated trunk: no name

Subjective Evaluation

Since I am not aware of any tests of this lens, I cannot make any comments about its optical performance.