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Reproduced for Historical & Reference purposes by Paul M. Provencher -
http://whitemetal.com
24
Interchangeable Lenses
The Asahi Pentax offers many interchangeable lenses in a wide variety of focal lengths, all of
which are highly respected by both professional and amateur photographers for their fine
resolution. The photographic coverage of various Takumar lenses is illustrated on page 25.
With focal length longer than 55mm, the subject image is seen through the viewfinder larger
than its life size. Regardless of the lens selected for your Asahi Pentax, there is never need for
an accessory viewfinder, ordinarily required for rangefinder type cameras.
When interchanging lenses, hold the lens by the distance scale ring. When attaching a lens,
filter, or lenshood, do not screw it too tightly, as you may find it difficult to remove.
Fixed Focus Setting
Because of the considerable depth of field of wide-angle lenses, you can use them as fixed-
focus lens if the diaphragm and distance scales are set properly. For your convenience, the
Super-Takumar and SMC Takumar lenses shown on pages 26 and 27 (marked with *) have a
fixed focus mark. Just align with the index the orange-colored figures of the diaphragm and
distance scales, and the lens will be in fixed-focus from foreground to infinity. You'll find this
extremely convenient for fast shooting.
Super-Multi-Coated (SMC) Takumars
Pentax SMC Takumar lenses are the world's first 7-layer multi-coated lenses. A truly
remarkable optical achievement. Conventional lenses have only 1-3 layer coatings. The
additional coating of SMC Takumar lenses let in more lighting resulting in truer colors.
Reflection is reduced to 0.2% allowing the remaining 99.8% of light to pass through. This
means higher light transmission, and the brightest lens possible. Colors pass through with
equal intensity so color balance is strikingly improved. Brighter blues. Vibrant reds. Truer
yellows. SMC Takumar lenses make it possible. And no ghosts or flares even when shooting
against the sun. Ultra violet light is reflected off the glass surface. So only true colors are
absorbed. Undesired rays are kept out. SMC Takumar lenses are for people interested in the
ultimate in photographic lenses.