Kenko Teleplus Pro 300 DGX AF 1.4x Teleconverter for Nikon AF-S


List Price: $259.99

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Kenko PRO 300 AF 1.4X DGX: Picture 1 regular $128.99

About Kenko PRO 300 AF 1.4X DGX

Kenko Teleplus Pro 300 DGX converters are made with precision quality multi-coated optical glass supplied by Hoya Corporation, the worlds largest manufacturer of optical glass. These glass elements were designed to match the optical quality of the prime lens (even at the edges) and telephoto zoom lenses. The optical design of the elements and light path is wide enough not to cause vignetting.

The Pro 300 family are designed specifically to be used with prime telephoto lenses of 100mm or above, such as 300 mm f/2.8 lenses and work best with telephoto lenses of 200mm to 500mm. The Pro 300 can be used with telephoto zoom lenses as well as prime lenses. However, Kenko does not recommend them for zoom lenses that have a range starting under 50 mm.

Kenko Pro 300 AF Teleplus converters have genuine Gate Array IC (Integrated Circuitry). It means that the converter's own unique circuitry maintains signal integrity between the camera body and lens. These converters are designed to electronically operate the same way as an original manufacturer's converter. With the Pro 300 1.4x, DGX full AF operation is possible with camera lenses having a maximum aperture of F4 or brighter.

The same light and contrast requirements apply. The DGX Teleplus converters have updated circuitry to record exif data more accurately. In the exif exposure data (meta-data recorded with a digital picture) DGX converters record the equivalent aperture and focal length of the lens setting plus tele-converter. Optically and mechanically they are the identical to the prior high-quality DG series converters.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Durable (8),Lightweight (7),Consistent output (6),Easily interchangeable (6),Fast / accurate auto-focus (6),Strong construction (5),Compact (3),Easy to use (3)
Poor in low light (3)
Best Uses:
Wildlife photos (12),Landscape/scenery (8),Macro photography (3),Sports/action (3)
Reviewer Profile:
Photo enthusiast (12)

Kenko PRO 300 AF 1.4X DGX Specifications

Depth of field
1/1.4 of prime lens
Minimum focus distance
Same as prime lens
Diaphragm coupling
Fully automatic
Lens coating
Digital Multi Coating
Exposure Magnification
Approx 2 times (equivalent to 1 diaphragm)
Mount Available for
Nikon AF-S
Barrel length
27.0mm approx.
4.6 oz.(132g)
Mfr #

Kenko PRO 300 AF 1.4X DGX Reviews

Review Snapshot®


(based on 15 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Most Liked Positive Review


Solid, clear teleconverter

You loose one stop of course but autofocus still works up till f:8 if there is sufficient light. Good glass, accurate fitting

Reviewed by 15 customers


Excellent Product


from Fort Wayne, Indiana  -  Semi-pro Photographer

This converter works perfectly with my Nikon equipment, including a variety of lenses. Image quality is first rate and the auto focus is exceptional, especially with prime lenses.




from Lowell, MA USA  -  Photo Enthusiast

The quality of the pictures has more to do with the lens you mount this on. I use it on a Canon ef 70-200 f/4 with very good to excellent results. The limiting factor is in obtaining precise focus as the depth of field is reduced with higher focal length. Also on the Canon 85 f/1.8 at f/2.8 with great sharpness. There is some color fringing on the 85mm but that is characteristic of the lens not the converter. The connection between lens and converter is not lock tight, but presents no meaningful problem. There is very little to complain about with this product. It just works well.


Inconclusive So Far


from Atlanta  -  Photo Enthusiast

I am still comparing images with this teleconverter. One thing is for sure, it saves money on buying even more expensive glass. I use this TC with my 70-300L, and so far, the images have been acceptable. My 420mm shots are not as clean as my 300mm shots, but I have 120mm more reach than I had before.


Kenko Teleplus Pro 300 DGX AF 1.4x TC


from Sparks, NV  -  Photo Enthusiast

Use it with my 100-400L. It does not seem to degrade the image at all. It does cause my 7D to hunt with the lens unless there is high contrast and lots of it. Lots of light is needed also to get AF. BIF do not seem possible.

(2 of 3 customers found this review helpful)


better than Nikon


from Miami  -  Photo Enthusiast

After dealing with Nikon tech support (equivalent to no support) I bought a Nikon teleconverter which was incompatible with my lenses. This was after spending much time with Nikon tech & having them tell me that the lenses were compatible. I sent the Nikon back & bought the Kenko which solved my problems, is a quality product and is easy to use. I recommend it.


Good glass for the money


from DC  -  Photo Enthusiast

I use it with a Canon 70-300. It does the job.


Excellent 1.4x


from Ann Arbor, MI  -  Photo Enthusiast

Well, it's my first teleconverter, so can't compare, but it works great.


Glad I bought it


from Oberflockenbach, Germany  -  Photo Enthusiast

Gives me that extra reach with very little degradation in image quality.

(0 of 1 customers found this review helpful)


Great Addition


from San Diego, CA  -  Photo Enthusiast

I use this mostly with my 90mm Macro and it kicks it out to 126mm for closer shots. Easy to carry and works great. Very happy.

(4 of 4 customers found this review helpful)


Good value


from North Bend, OR  -  Photo Enthusiast

Used with Canon 7D, Canon EF 70-300mm f/4-5.6 IS USM. With typical landscapes and good light, the Kenko TC performs very well, focusing quickly with good accuracy. I noted some softening at the extremes, but that was expected and somewhat correctable in software. Much better than expected performance shooting macro from 5 1/2'. Birds in flight presented a much larger challenge and performance here was inconsistent with focus often too slow to capture subjects accurately. Overall, a useful addition to the bag for Canon shooters wishing to extend their range a bit without taking out a second mortgage for "L" lenses and the pricey Canon TC that only works on "L" lenses. The Kenko TC will NOT work on EF-S lenses and in some situations, count on focusing manually for best results.


Questions & Answers Powered by TurnTo®

Questions about this item:

k n  Is this the same as this number? Kenko Teleplus Pro 300 DGX AF 1.4x teleconverter for Nikon AFD
WILLIAM B  The Kenko 1.4 teleconverter has extended my Nikon 70-300 mm zoom lens to 420 mm without any noticeable loss of sharpness. It performed well for shooting wildlife on a trip to Antarctica.
k n  What is the difference between AFD and AF-S? Is this the same converter. I was asked to buy the AFD but not seeing that designation.
k n  Is this the same as this number? Kenko Teleplus Pro 300 DGX AF 1.4x teleconverter for Nikon AFD
WILLIAM B  The Kenko 1.4 teleconverter has extended my Nikon 70-300 mm zoom lens to 420 mm without any noticeable loss of sharpness. It performed well for shooting wildlife on a trip to Antarctica.
k n  What is the difference between AFD and AF-S? Is this the same converter. I was asked to buy the AFD but not seeing that designation.
MICHAEL C  Will this work with a Sigma 150-500 lens and NikonD7100?
HARRY B S  I am a consumer, advanced amateur photographer and have practiced medicine for 43 years. Use this bio info and a grain of salt to evaluate my answer. I use my Kenko 300DGX 1.4x with my Nikon d7000 and d300s bodies. . You need to call or email Kenko and find the SMALLEST f-stop on your Sigma lens which will permit full auto focus with the teleconverter. I use mine with the original old Nikon 80-400 mm VR zoom which has a minimum aperture of f5.6 at the full 400mm extension. The Kenko is fully-compatible with this minimum aperture at full extension and auto focus functions perfectly in this situation. I have used this cameras/lens combo in Africa for bird & other wildlife photography with stunning results. The Sigma lens has a minimum f-stop of 6.3. You need to contact Sigma customer services and ask if the Sigma lens will function with full auto focus when fully-extended to 500mm with the Kenko teleconverter. At this 500mm focal length and the 6.3 f stop you may need to use manual focus as the auto focus will not work at this focal length with the Kenko teleconvertor. Sigma makes a fine teleconvertor for this lens which will probably solve your problem and enable full autofocus at full 500mm extension and 6.3 f-stop.I am sure that you can purchase this from Adorama. Buying a Sigma teleconvertoer which is compatible with your lens will probably be the best way to go. Good luck, I hope my discourse proves helpful. I would guess that the Sigma teleconverter and your lens would be fully compatible with the Nikon 7100 but you may need to contact Nikon to be totally sure.
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