Pentax SMC-DA 70mm f/2.4 Limited - Review / Test Report
Lens Reviews - Pentax

Review by Klaus Schroiff, published May 2007

Special thanks to Jonas B. for providing this lens!


The test report of the Pentax SMC-DA 70mm f/2.4 Limited completes the "gang of three" - the three pancake lenses in the current Pentax lens lineup (as of the time of this review). Looking at its shape it is quite obvious why it is called a pancake lens - it is as flat. Just like most current Pentax lenses it is a DA lenses with a reduced image circle dedicated to the APS-C format. Its field-of-view is equivalent to 105mm on full format cameras so combined with its relatively fast max. aperture it resides within the sweet spot of portrait photography.

The DA 70mm f/2.4 is a Limited lens - these lenses are build to higher quality standards and the mechanical quality is indeed excellent thanks to a metal shell and tight tolerances. The tiny focus operates smooth and slightly damped. As you can see below the lens extends slightly when focusing towards close focus distances. The screw-in metal hood (telescope-style) does almost double the size of the lens.

Typical for most Pentax lenses the DA 70mm f/2.4 has no internal AF motor and relies on a slotted drive screw operated by the camera. Consequently AF operations generate a moderate degree of noise. The AF speed is fast on the K10D. Thanks to a "Quick-Shift Focus System" manual focusing is instantly possible once the AF has achieved focus - this works very well and noiseless.

Equiv. focal length105 mm (full format equivalent)
Equiv. aperturef/3.6 (full format equivalent, in terms of depth-of-field)
Optical construction6 elements in 5 groups
Number of aperture blades9
min. focus distance0.7m (max. magnification ratio 1:8.3)
Filter size49mm (non-rotating)
Hoodscrew-in type (supplied)
Other features-

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