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Nikon AF-S 300mm f/2.8G ED VR II December 10, 2009 A fast telephoto lens offering built-in Vibration Reduction (VR II), and the world’s first telephoto converter to utilize an aspherical lens element, extending focal length by 2×, both compatible with the FX format TOKYO —...
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There are 3 listings and 14 reviews.

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Latest Reviews

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Kenko Teleplus PRO 300: Good, but not great
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Kenko Teleplus PRO 300: Definitely not recommended
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Kenko Teleplus PRO 300  Hot

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Teleconverter Reviews Kenko
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Editor's rating
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Lens Summary

Overview

Product Description
KENKO Teleplus Pro 300 converters are made with high quality multicoated optical glass supplied by Hoya corporation, the worlds largest manufacturer of optical glass. This glass will match the optical quality of the prime lens (even at the edges, unlike many teleconverters on the market today). The optical design of the elements and light path is wide enough not to cause any Vignetting.They are designed specifically to be use with telephoto lenses of 100mm or above, and work best with telephoto lenses of 200mm to 500mm. The PRO 300's can be used with telephoto Zoom lenses as well as prime lenses, but, due to their design, Kenko does not recommend them for lenses that have a zoom range that starts under 50 mm.Kenko PRO 300 converters are intended to be used with expensive telephoto lenses and larger camera bodies. They have all metal lens mounts in both front and rear, as well as a metal core, to support today's heavy professional camera bodies.Kenko PRO 300 AF teleconverter will not auto focus with the following Nikon lenses: Nikon AF-S ED 300mm f/2.8D (IF), Nikon AF-I ED 400mm f/2.8D (IF), Nikon AF-S ED 500mm f/4D (IF), Nikon AF-S ED 600mm f/4D (IF), Nikon AF-S ED 80-200mm f/2.8 (IF), Nikon AF-D ED 200mm f/4. DG Series New DG Series have upgraded "Gated-Array" circuitry to work better with the digital SLR's and some of the the new digital only lenses. They still work the same with film SLR Cameras and lenses as well

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User Lens Reviews

Average user rating from: 3 user(s)

Overall rating (weighted)
3.0
Sharpness
2.7
Build Quality
3.7
AF Speed
3.0
Value for Money
2.7
 

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5 of 5 people found the following review helpful

Good, but not great, Saturday, 07 March 2009


Overall rating (weighted)
3.5
Sharpness
4.0
Build Quality
3.0
AF Speed
4.0
Value for Money
3.0
I bought this to go between my D80 & my Nikon 80-200 AF 2.8D when I need extra Focal length. Other than quickly confirming that AF & metering works with all my lenses, I have not used it with any other camera/lens combination. There is a noticeable loss of sharpness when using the converter, but that's compared to a very sharp lens without the converter. Overall, image quality is satisfactory.

If your reason for choosing this over the Nikon converter is autofocus on AF lenses, then you should be aware that autofocus only works well in very bright lighting. Autofocus does not work in low light, such as poorly lit rooms and twilight hours. The camera tries but focus lock is never achieved. It works slowly and inaccurately in moderate light, such overcast days. Focus locks, but it's often not sharp. It's possible that my camera is to blame, but you should expect to focus manually much of the time with this converter. However, if your use will be mostly outdoors in good weather then the autofocus will likely meet your needs.

Due to the price difference and lack of autofocus with AF lenses, I didn't investigate the Nikon converter. Had I known that I would focus manually on 80% of my shots with the Kenko converter, I would have tried the Nikon to see how the picture quality compared.

One additional note: While I only tried a couple test shots and would not recommend counting on this, in bright light this converter worked with my 18-135 f3.5-5.6 kit lens & my 70-300 f4-5.6 VR lens (for a 35mm equivalent of 900mm f11). Nikon's guidance that autofocus and metering only work at effective apertures of 5.6 or larger appears not to be set in stone. I plan to play more with the 300mm. I'll try to remember to post how it works out.
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2 of 2 people found the following review helpful

Definitely not recommended, Monday, 27 October 2008


Overall rating (weighted)
2.0
Sharpness
1.0
Build Quality
5.0
AF Speed
1.0
Value for Money
1.0
I bought this for use on my Sigma 170-500 APO, and I use it only when I'm absolutely desperate, when any photo is better than none at all. It produces an image that's sharper than I get using software to enlarge a photo taken without it, but there is no way you could call the image this thing produces sharp. It's so bad that it's a last resort tool only. My Sony Alpha 700 will autofocus using it with the Sigma 170-500 for only up to around 350mm focal length, then I have to go to manual focus. That I can live with, but the lousy image quality I can't live with.
Why should you care what I think?
My relationship with this item: I own it
Conclusions at a glance
Would you recommend this Item: No
Pros: Cheap
Cons: Unacceptably unsharp with unacceptable low Contrast
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2 of 2 people found the following review helpful

Good 2x magnication, Sunday, 22 July 2007


Overall rating (weighted)
3.5
Sharpness
3.0
Build Quality
3.0
AF Speed
4.0
Value for Money
4.0
This gives excellent image quality. Your viewfinder will look dark because of loss of 2 stops. Works quite well when you have good light conditions. I use it quite often with my Sigma 150mm. You may need to go into manual mode if light is not enough and the AF doesn't work. It multiplies the focal length of the master lens by 2 times. It offers full AF and metering capabilities as it has electronics and interfaces between the lens and camera and also taking care of the reduction in light. The mount is all metal. However the quality of the covering caps are not as good like Nikon orignal lens/body caps. It certainly does its job of avoiding carrying expensive high-tele end lenses. I am satisfied with this product
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