Kenko Teleplus Teleconverters & Extension Tubes

A Macro and Telephoto Accessory
Placed between the camera body and lens, a teleconverter contains a set of optics that will effectively increase the focal length of any lens with which it is used. The KENKO Teleplus 1.4x MC DGX and 1.5x MC DG converters has the effect of multiplying the focal length of your lens by 1.4x and 1.5x respectively. For example, using the 1.5x teleconverter with a 200mm lens will effectively increase the focal length to 300mm. Kenko Teleplus converters have genuine Gate Array IC (Integrated Circuitry). This means the converter’s unique circuitry maintains signal integrity between the camera body and lens. The 4-element design is made with high quality multicoated optical glass supplied by Hoya Corporation, the worlds largest manufacturer of optical glass. Full AF operation with the Teleplus 1.4x and 1.5x is possible using camera lenses with maximum open apertures of F4.5 or brighter. Please be aware that AF will work properly only if there is enough light and contrast on the subject to activate the camera’s AF sensors. (Manual focusing is recommended when using lenses with smaller open f-stop values than those given above.)

50mm 1.4 L + 36mm Extention Tube	50mm 1.4 L + 20mm Extension Tube
50mm 1.4 L + 12mm Extension Tube	50mm 1.4 L lens only

Macro
A little-known fact is that the Kenko 1.4x and 1.5x teleconverters are powerful optics for use in macro photography. An Example; a 100mm f2.8 macro lens may focus as close as 28cm (11”). At that distance the lens has a life-size reproduction ratio of 1:1. This means that if the subject is only 20mm long it will be 20mm long on the film or CCD. The 1.5x converts the lens into an equivalent 150mm lens with a reasonably bright equivalent F4 aperture with the same 28cm minimum focusing distance. Now at 28cm the reproduction ratio is larger than life sized, 1:0.75, which enters the realm of MICRO photography! Capture fine details that even a macro lens might have missed while maintaining the same working distance from the subject. Keeping the minimum focus distance the same is important for proper lighting. In the world of insect photography, maintaining a good working distance from your subjects is important for more natural looking photographs. If using manual lighting or metering it is import to remember than the 1.4x and 1.5x converters have an exposure factor equivalent to a 1 stop light loss.

Telephoto
It is an easy and inexpensive way to increase the abilities of your telephoto lens without the expense of purchasing and carrying another telephoto lens. For example, using the 1.5x AF teleconverter with a 300mm F2.8 lens will effectively increase the focal length to 450mm with an equivalent aperture of F4. The Kenko Teleplus 1.5x DG is just 25mm thick, so it takes up very little room in your camera bag.

Please note: Teleplus teleconverters are not suitable for use with Canon EF-S lenses due to the shape of these lenses. For users of Sony Alpha cameras: when using with a Sony SSM lens, the autofocus may not function correctly, in this case, please focus manually.

Please note: Teleplus teleconverters are not suitable for use with Canon EF-S lenses due to the shape of these lenses. For users of Sony Alpha cameras: when using with a Sony SSM lens, the autofocus may not function correctly, in this case, please focus manually.

Kenko Teleplus Pro 300 1.4x and
2x DGX and DG Teleconverters
Ideal for use with Longer Lenses
KENKO Teleplus Pro 300 converters are made with precision quality multicoated optical glass supplied by Hoya Corporation, the worlds largest manufacturer of optical glass. These glass elements are designed to match the optical quality of the prime and telephoto zoom lenses (even at the edges). The optical design of the elements and light path is wide enough not to cause vignetting.

Please note: Teleplus teleconverters are not suitable for use with Canon EF-S lenses due to the shape of these lenses. For users of Sony Alpha cameras: when using with a Sony SSM lens, the autofocus may not function correctly, in this case, please focus manually.

KENKO PRO 300 AF Teleplus converters have genuine Gate Array IC (Integrated Circuitry). It means that the converter’s unique circuitry maintains signal integrity between the camera body and lens. These converters are designed to electronically operate the same way an original camera manufacturer’s converter would, provided there is enough light available.
Important Note: Due to the 3-stop light loss inherent in a 3x converter, the Kenko PRO 300 3x does not give AF capability; the lens will need to be focused manually. The converter has all the compatible circuitry for aperture activation and metering.

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 Kenko 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 12mm, 20mm, and 36mm, which can be used individually or in any combination to obtain the desired magnification.
Kenko's 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 Sony/Minolta lenses, given there is enough light to activate the camera’s AF system properly.
Please Note: 1. When using extension tubes the lens will not focus to infinity. The focus range will be greatly limited to a very close focusing distance. 2. 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 camera's ability to auto focus. Manual focusing is recommended should the lens begin to "hunt" (not lock onto the subject). 3. Nikon "D" information is not transmitted because the lens is focusing closer than it is programmed to focus. 4. Kenko DG Auto Extension Tubes are auto focus compatible with Nikon AF lenses including Nikon AF-S (silent Wave) lenses, as well as Canon EF and EF-S lenses.

* The above table shows general values for 50mm standard lenses. Even with standard lenses, individual lenses may have actual values slightly different from these.
* Image Magnification Ratio is the ratio in size (lengths) between the subject and the image formed on the film or sensor surface. For example, Image Magnification Ratio 0.24X means that a 1cm subject becomes 1x0.24=0.24 or makes a picture of 0.24cm size on the film or sensor surface.
* When using an extension tube of same length, the image magnification ratio becomes smaller as the focal length of master lens becomes longer and larger as the focal length becomes shorter. Also, the distance to the subject becomes further away as the focal length of master lens becomes longer and closer when it becomes shorter.
* For other than standard lenses, please calculate according to the following formulae: