Lens Extenders

[neuroanatomist]

Not sure about the IQ - perhaps someone with a Canon 1.4x can let you know?

Generally speaking, a native lens will be better than a lens + extender, when you're talking about comparing lenses in the same class. For example, a 70-200mm f/4L + 1.4x (=280mm f/5.6) will not be as good across the frame as a 100-400mm. But that doesn't hold true for non-L lenses compared to L lenses. Also, Bryan reports that the 200-300mm region of the 70-300mm f/4-5.6 IS lens is it's weakest area. Check out Bryan's ISO 12233 Crops comparing them - the 70-200mm f/4 + 1.4x II wins, hands down.

[PaulM]

Bryan reports that the 200-300mm region of the 70-300mm f/4-5.6 IS lens is it's weakest area. Check out Bryan's ISO 12233 Crops comparing them - the 70-200mm f/4 + 1.4x II wins, hands down.

Good thinking - Bryan to the rescue on that wayward advice! Nearly went boggle-eyed looking at the 70-300 chart [:|]


Paul

[Sheiky]

I googled a bit for the extender comparison, but the only think I found so far is this: [url="http://www.traumflieger.de/desktop/telekonverter/konvertertest2_teil4.php]http://www.traumflieger.de/desktop/telekonverter/konvertertest2_teil4.php[/url]


It's in German though, so you'd have translate it. (easy with Internet Explorer). I already put it on page 4 with the conclusions so you don't have to search for it.


[quote=Paul McSweeney]


[quote=neuroanatomist]Bryan reports that the 200-300mm region of the 70-300mm f/4-5.6 IS lens is it's weakest area. Check out [url="http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=404&Camera=453&Sample=0&am p;FLI=5&API=1&LensComp=358&CameraComp= 453&SampleComp=0&FLIComp=4&APIComp=0]Bryan's ISO 12233 Crops comparing them[/url] - the 70-200mm f/4 + 1.4x II wins, hands down.[/quote]


Good thinking - Bryan to the rescue on that wayward advice! Nearly went boggle-eyed looking at the 70-300 chart [img]/emoticons/emotion-8.gif[/img]
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I was shocked when I saw the results [:S] It had to be very good to justify it's price (which is A LOT more than the 70-200 F4L IS with 1.4x extender). Good info []