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Old 13th of April 2007 (Fri)   #1
onedownfiveup
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Default Difference between IS and non IS lens?

I've tried to search and can't find what the difference is.
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Old 13th of April 2007 (Fri)   #2
Roy Mathers
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Default Re: Difference between IS and non IS lens?

One has image stabilisation, the other doesn't. Other than that, I'm not sure what the question means.
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Old 13th of April 2007 (Fri)   #3
inthedeck
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Default Re: Difference between IS and non IS lens?

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.
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Old 13th of April 2007 (Fri)   #4
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Default Re: Difference between IS and non IS lens?

About $500!!!
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Old 13th of April 2007 (Fri)   #5
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Default Re: Difference between IS and non IS lens?

here is a pretty nice explanation http://web.canon.jp/Imaging/lens/index.html
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Old 13th of April 2007 (Fri)   #6
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Default Re: Difference between IS and non IS lens?

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Originally Posted by D.C. View Post
About $500!!!
I just noticed that.


Thanks guys!
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Old 13th of April 2007 (Fri)   #7
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Default Re: Difference between IS and non IS lens?

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Originally Posted by D.C. View Post
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.
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Old 13th of April 2007 (Fri)   #8
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Default Re: Difference between IS and non IS lens?

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?
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Old 13th of April 2007 (Fri)   #9
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Default Re: Difference between IS and non IS lens?

Quote:
Originally Posted by inthedeck View Post
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)

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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?
the size of the IS elements, gyros, and servos each have very high size to cost ratios, bigger=much more expensive
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Old 13th of April 2007 (Fri)   #10
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Default Re: Difference between IS and non IS lens?

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.
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Old 13th of April 2007 (Fri)   #11
inthedeck
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Default Re: Difference between IS and non IS lens?

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Originally Posted by basroil View Post
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...
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Old 13th of April 2007 (Fri)   #12
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Default Re: Difference between IS and non IS lens?

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Originally Posted by wcl4 View Post
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.
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