Nikon TC-20E III 2x Teleconverter

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Neil Williams
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Guys,
Anyone ever used one of these puppies on a D3s or the likes with a 70/200mm f2.8...............I belive it will change the f to a 4.5 rather than a 2.8 is that correct??
 
I had one on evaluation for a week and can't say that it impressed me greatly, used it on my 70-200 f2.8 and 300 f4 and it seemed to be a lot of money for little advantage over my 1.7. May not have been able to fully test it due to committments but that was my overall impression.
 
You may be right, but it's an awful lot of money for such little benefit IMO - I suppose if you've got plenty of cash to throw around and you don't need to much for it then that's fine but it didn't offer me £450 worth of benefit TBH.
I would recommend anyone trying before buying.
 
Tried one for about 20 minutes, D3S with 400mm f/2.8 and it was very, very good, AF was still quite snappy, there was an obvious loss in IQ but very very acceptable and it did seem to have a slight adverse effect on exposure, images were a little darker, possibly underexposing by half a stop but all in all very good with this combo

D3S and Nikon 70-200mm f/2.8, got to say it was poor in all honesty, differing drops in IQ at different focal lengths and AF slowed quite dramatically and was twitchy, underexposure was also noticeable, very soft images at 200mm to soft at 70mm, would have to say it would be rubbish for field sports where AF speed and tracking are a priority.

To conclude, very good on Nikon long primes but poor on zooms
 
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