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Difference between IS and non IS lens?

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Thread started 13 Apr 2007 (Friday) 15:15   
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onedownfiveup
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I've tried to search and can't find what the difference is.

Post #1, Apr 13, 2007 15:15:12


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Roy ­ Mathers
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One has image stabilisation, the other doesn't. Other than that, I'm not sure what the question means.

Post #2, Apr 13, 2007 15:22:21




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inthedeck
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What Roy said. Though, for some reason, some people say that the 300 f4L non-is has slightly better image quality than the 300 f4l IS. Beyond me, as the 300 f4L non-is is no longer made.

Post #3, Apr 13, 2007 15:43:18


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D.C.
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About $500!!!

Post #4, Apr 13, 2007 15:52:36


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thekid24
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here is a pretty nice explanation http://web.canon.jp/Im​aging/lens/index.htmlexternal link

Post #5, Apr 13, 2007 15:58:04


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onedownfiveup
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D.C. wrote in post #3036277external link
About $500!!!

I just noticed that.


Thanks guys!

Post #6, Apr 13, 2007 16:45:18


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shaneotool
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D.C. wrote in post #3036277external link
About $500!!!

I guess if they took the IS out of my 70-300IS, it would be worth about as much as a KFC snacker.

Post #7, Apr 13, 2007 16:55:58




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wcl4
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I never quite understood why IS varies in cost on different lenses. On the 70-200 f2.8, the IS makes that lens $600 more than the non IS version, around $450 on the 70-200 f4, and yet the 70-300 IS goes for ~$500. Does that mean the glass is only worth $100? $200? Nothing?

Post #8, Apr 13, 2007 17:27:12


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basroil
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inthedeck wrote in post #3036220external link
What Roy said. Though, for some reason, some people say that the 300 f4L non-is has slightly better image quality than the 300 f4l IS. Beyond me, as the 300 f4L non-is is no longer made.

not when the IS is off. when IS is off, the two versions have almost identical results. IS version of lenses will have about 2 extra elements unless the IS and non-IS are completely different designs (usually not the case)

wcl4 wrote in post #3036736external link
I never quite understood why IS varies in cost on different lenses. On the 70-200 f2.8, the IS makes that lens $600 more than the non IS version, around $450 on the 70-200 f4, and yet the 70-300 IS goes for ~$500. Does that mean the glass is only worth $100? $200? Nothing?

the size of the IS elements, gyros, and servos each have very high size to cost ratios, bigger=much more expensive

Post #9, Apr 13, 2007 17:37:12


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wcl4
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Thanks for the answer to the IS cost question. Not knowing anything about the mechanics of the technology, I would think the amount of stabilization a telephoto lens needs would be less than on a shorter length lens since minute amounts of vibrations are amplified by the focal length of the telephoto lens.

Post #10, Apr 13, 2007 17:45:58


WILLIAM LEE

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inthedeck
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basroil wrote in post #3036778external link
when IS is off, the two versions have almost identical results.

Almost is not completely. Close, but no cigar.

I may never know, as I don't own the 300 prime with no IS. Maybe when a 400 5.6L IS comes out, if ever, I can compare the current 400 5.6L with one that does have IS. That would be cool...

Post #11, Apr 13, 2007 19:05:59


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runninmann
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wcl4 wrote in post #3036813external link
Thanks for the answer to the IS cost question. Not knowing anything about the mechanics of the technology, I would think the amount of stabilization a telephoto lens needs would be less than on a shorter length lens since minute amounts of vibrations are amplified by the focal length of the telephoto lens.

Is this really what you meant to say? I would expect the opposite to be true.

Post #12, Apr 13, 2007 19:15:26


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Difference between IS and non IS lens?
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