Product Description
Kenko DG Teleplus Extension Tube Set
Extension tubes are designed to enable a lens to focus closer than its normal
set minimum focusing distance. Getting closer has the effect of magnifying your
subject (making it appear larger in the viewfinder and in your pictures). They
are exceptionally useful for macro photography, enabling you to convert almost
any lens into a macro lens at a fraction of the cost while maintaining its
original optical quality.
The DG extension tubes have no optics. They are mounted in between the camera
body and lens to create more distance between the lens and film plane. By moving
the lens father away from the film or CCD sensor in the camera, the lens is
forced to focus much closer than normal. The greater the length of the extension
tube, the closer the lens can focus.
The KENKO DG AUTO EXTENSION TUBE SET contains three tubes of different length, a
12 mm, 20 mm, and 36 mm, which can be used individually or in any combination to
obtain the desired magnification. Kenko also makes a DG UNITUBE 12 mm or 25 mm
which can be purchased individually.
Kenkos Auto Focus extension tubes are designed with all the circuitry and
mechanical coupling to maintain auto focus and TTL auto exposure with most
Canon, Nikon, and Minolta lenses given there is enough light to activate the
cameras AF system properly.
Please Note;
- When using extension tubes the lens will not focus to infinity. The focus
range will be greatly limited to a very close focusing distance.
- There is light fall off when using any extension tube, sometimes the
equivalent of 3 f-stops of light is lost when using multiple extension tubes
together. This light lost can affect the cameras ability to auto focus.
Manual focusing is recommended should the lens begin to "hunt" (not lock onto
the subject).
- Canon EF-S lenses will not mount on the KENKO DG Extension Tube Set. These
lenses include but not limited to EF-S 10-22, EF-S 17-85, EF-S 18-55, and EF-S
60mm Macro.
- Nikon "D" information is not transmitted because the lens is focusing
closer than its programmed to focus.
- Kenko Auto Extension Tubes are not auto focus compatible with Nikon AF-s
(Silent Wave) lenses, manual focusing is required with these lenses."
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