SNATH
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Joined: Mon Mar 29, 2004 5:23 am

IQ Comparison Of The New Canon Teleconverters

Thu Dec 30, 2010 8:51 pm

Hi guys,

I think this might be of interest. Bryan posted an IQ comparison between the old/new Canon teleconverters. The test lens is the 200mm f2 L IS which is apparently very sharp:

http://www.the-digital-picture.com/N...Extender-1.4x-2x-III-Image-Quality

1.4x III vs. 1.4x II

http://www.the-digital-picture.com/R...3&SampleComp=0&FLIComp=1&APIComp=0

2x III vs. 2x II

http://www.the-digital-picture.com/R...3&SampleComp=0&FLIComp=2&APIComp=3

As Bryan pointed out, the new 1.4x is similar to the old one but with less barrel distortion. The new 2x though looks much better.

Tony
Nikon: we don't want more pixels, we want better pixels.
 
JakTrax
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RE: IQ Comparison Of The New Canon Teleconverters

Thu Dec 30, 2010 11:34 pm

I was eager to view such a comparison. In the 1.4x comparison, the II actually looks better mid-frame than the III, although generally the III seems to have the edge.

The 2x comparison is much more clear cut. Looks like they really went to town with the III, as it's visibly far better.

Not enough in the 1.4x to justify the cost in my opinion, but the 2x III is impressive to say the least!

Thanks Tony.

Karl
 
SNATH
Topic Author
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Joined: Mon Mar 29, 2004 5:23 am

RE: IQ Comparison Of The New Canon Teleconverters

Fri Dec 31, 2010 8:15 am

Karl,

Quoting JakTrax (Reply 1):
the II actually looks better mid-frame than the III,

This is what I was seeing too!

Quoting JakTrax (Reply 1):
although generally the III seems to have the edge.

I agree.

Quoting JakTrax (Reply 1):
The 2x comparison is much more clear cut. Looks like they really went to town with the III, as it's visibly far better.

Yeah, the new 2x looks awesome. It actually opens up many new possibilities, like maybe getting decent results when mounting it on a f/2.8 zoom / prime.

Tony
Nikon: we don't want more pixels, we want better pixels.
 
ckw
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RE: IQ Comparison Of The New Canon Teleconverters

Fri Dec 31, 2010 3:33 pm

That does appear to be a significant improvement. However, test conditions are quite different to real world - I wonder how much of this difference will be visible after the effects of atmospheric distortion, dust etc. are factored in?

Using the 2x mk2 with my 500 I suspect more shots are lost due to environmental conditions than lack of quality in the convertor itself. Still, if I could get a decent trade-in on my Mk 2, I think I'd be willing to give it a try. As for the 1.4 - well I don't think there was a lot of scope for improvement in the optical department anyway.

Interestingly, the 200 + 2xmk3 compared to the 100-400 appears to be much better in the corners, though the 100-400 still has the edge in the center. I would love to see the latest 70-200 f4 IS (which is very sharp) with the convertor compared to the 100-400. I could happily live with the f8 aperture if it came close in quality, and just give up on Canon replacing the 100-400.

Cheers.

Colin
Colin K. Work, Pixstel
 
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JohnKrist
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RE: IQ Comparison Of The New Canon Teleconverters

Mon Jan 03, 2011 2:20 pm

Great comparison, and that was what I was hoping for in the 2x III, it's far cheaper than buying a 100-400 in my case, and lighter in my bag for sure. At least it looks like it's getting closer to the 100-400 IQ. Now I would like see it in use on a 70-200 2.8 IS too  
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