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Old May 3, 2006, 8:44 PM   #1
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I have a Nikon D70 and Nikon 300 2.8 AF-S I lens. I recently purchased a Nikon TC-20E II teleconverter. My problem is with the converter installed, I can barely see through the viewfinder and can only get a shutter speed of about 1/160, metering against a bright blue sky at ISO 1600 andautofocus is non existent. I am using Aperture priority and the camera reports a 5.6 which it should with the 2X. Is there something more to know about adding this converter or is this normal behavior?
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Old Jul 29, 2006, 2:56 PM   #2
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not sure ... I have tried kenko 2x with AF-S 80-200 and I don't see any problem like you mentioned ... probably something is faulty lens/Tc/camera
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Old Jul 30, 2006, 11:14 AM   #3
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I think that you probably have a problem with either the TC itself or the lens or camera contacts. If the lens is metering fine without the TC then there is a problem with the TC itself sending erroneous information to the camera. A loss of two stops gives F5.6 and so is correct but ISO 1600 and no autofocus? That surely isn't correct. I use the TC range on the 70/200 and the 200/400 to great effect but with the 200/400 having a maximum aperture of F4 less two stops then it tends to hunt even in bright weather but still autofocuses in the end. I'd have the TC checked if I was you. Here is a shot taken at 10.30pm a couple of weeks back at the maximum ISO rating using the 70/200 and TC14E II converter which, while grainy (or noisy nowadays) stll comes up reasonably well with a bit of cleaning up. I emphasise that it was nearly dark so I am claiming no prizes for the shot but was agreeably surprised by the result given that this is motor racing (GT40's they are) and so autofocus had to work overtime. You should be getting equivalent results too I feel.

Take the TC back.
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Old Jul 30, 2006, 11:43 AM   #4
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Thanks for the replies. I did return the TC and bought a TC14E and had the same results. I read somewhere that there was a problem with some of the earlier AF-S lenses and TC's (particularly the 300mm F4). I am thinking I might have the same problem, because of having the same results with two different TC's.
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Old Jul 30, 2006, 11:57 AM   #5
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Should do though - this is taken direct from the Nikon web site:-

[align=center][size=TC Converters and usable lenses][/size][/b][/align]
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Nikon AF-S teleconverters are designed exclusively for use with AF-S and AF-I Nikkor lenses. However do not use AF-S DX 12-24mm f/4G –IFED, AF-S 17-35mm f2.8G IF-ED, AF-S DX 18-70mm f3.5/4.5G IF-ED, AF-S 24-85mm f3.5/4.5G IF-ED, AF-S VR 24-120mm f3.5/5.6G IF-ED, or AF-S 28-70mm f2.8 If-Ed lens. Also autofocus cannot be used with the AF-S teleconverter TC-17E II and TC-20E II attached with the AF-S VR 200-400mm f/4G IF-ED, AF-S 300mm f/4 IF-ED, AF-S 500mm f/4 II IF-ED, AF-S 500mm f/4 IF-ED, AF-S 600mm f/4D II IF-ED, AF-S 600mm f/4D IF-ED, AF-I 500mm f/4D IF-ED and AF-I 600mm f/4 IF-ED lens. Vibration function can be used with the VR (Vibration Reduction) lens used with the F5, F100, F80 series/N80 series*, F75 series/N75 series*, F65 series/N65 series*, D2h, D1 series, D100 or D 70 camera body. When the AF-S Teleconverter TC-17E II is attached with the AF-S 300mm f/2.8D IF-ED or AF-S 400mm f/2.8D IF-ED is used with the F5, F100, D2h, D1 series, D100 or D70 camera body, focal length of the shooting data is not displayed correctly (it is displayed correctly with the AF-S 300mm f/2,8D II IF-ED and AF-S 400mm f/2.8D II IF-ED)

* The Nikon N80 series, N75 series and N65 series are sold exclusively in the U.S.A.


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