09-12-2008, 12:46 PM
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Registered User
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Join Date: Aug 2005
Location: Hahndorf, South Australia
Posts: 4,262
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Quote:
Originally Posted by robgreaves
Nice comparison... Nice shot too, actually! The Canon 2x Extender is also a decent bit of kit, and makes a much greater (well, 2x!) focal length difference.
On something like the 300mm L series it's superb. There are a couple of lenses that it won't AF on due to the 2 stops of light loss. I think there is only 1 stop of loss on the 1.4x.
Regards,
Rob
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A 2x on my 70-200mm f4L would turn it into a f8 , but on a f2.8 lens - very nice
Quote:
Originally Posted by RB
Nice one Dougie. 
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I like the tone of your response young man!!
Quote:
Originally Posted by Dennis
Sorry Doug, this is an invalid test. 
You did not control all the variables – the clouds moved between frames! 
I ran a similar test on the Canon 40mm F5.6 with the x1.4 and the x2 converters and when tripod mounted and using a remote release, both converters gave stunning results. 
Cheers
Dennis |
Bah, Humbug!!!
Is that the 400mm 5.6L? How do you find that for astro work?
Cheers all
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