Teleconverters: Nikon 1.4x and Kenko 1.4x - AF speed

Jim B

Jim B

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Jamie Blandford
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To be more precise the "Nikon TC-14E II 1.4x " and the "Kenko Teleplus Pro 300 DG 1.4x"

The Kenko is approximately half the price of the Nikon, and reading reviews and forums the general consensus is that the Kenko is near enough as good as the Nikon in terms of image quality.

What I'd like to know is how much difference is there in AF speed between the two TCs?

I'll be photographing rally cars and jets, so its AF speed is pretty important. Will be using a Nikon D300 and Nikon 300mm f/4 AF-S, so if anyone has experience with either of these TCs and a similar setup I'd be especially interested to hear how they found it.

Cheers,
 
I use my kenko 1.4 on D300 and Nikon 300 F4 for birds, cars and planes.

No problem with AF speed in any focus mode for me including 3D tracking.
 
I use my new Kenko 1.4x Teleplus PRO 300 DGX together with a Nikon D90 and a Nikon 300:4 AF-S. Autofocus works normaly fine but once in a while it stops autofocussing and releasing, than only manual focus works fine. Pictures which were made short before this phenomenon, have bad EXIF Information about focal width appeared (300mm instead of 440 mm).
If someone made the same expirience, pls leave me a helpful hint.

Frank
Germany
 
Hi Frank

Sounds like you have an electrical contact problem.

The DG version reports the 300mm f/4 AF-S as a 420mm f/4 as expected. I've never had any EXIF problems and have been use non-DG and DG fine since 2005.
 
puddleduck said:
Hi Frank

Sounds like you have an electrical contact problem.

The DG version reports the 300mm f/4 AF-S as a 420mm f/4 as expected. I've never had any EXIF problems and have been use non-DG and DG fine since 2005.
Click to expand...
Thank you puddleduck, I will check the contacts and replay to this threat later.
 
I bought a Kenko Pro DGX in the end, but I'm yet to test it properly. I put it on the 300 f/4 AF-S briefly one day messing about and it seemed to hunt occasionally, and also occasionally give up trying to AF momentarily. I blamed the poor light at the time, but will have a proper go soon and report back... :suspect:
 
Frankie - to clean the contacts on your lenses, just use a drop of lighter fluid on a cotton bud. Then rub GENTLY with an eraser (pencil rubber). The lighter fluid is alcohol basically, and it degreases the contacts. The eraser gives them a polish without removing much of the plating (don't use an ink rubber - it will scratch the gold plating badly.)
 
Lensflare said:
Frankie - to clean the contacts on your lenses, just use a drop of lighter fluid on a cotton bud. Then rub GENTLY with an eraser (pencil rubber). The lighter fluid is alcohol basically, and it degreases the contacts. The eraser gives them a polish without removing much of the plating (don't use an ink rubber - it will scratch the gold plating badly.)
Click to expand...

These domestic microfibre cloths are good for that job.
 
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