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Old Apr 8, 2012, 10:03 PM   #11
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Tamron 70-300mm VC USD is significantly cheaper than the Canon 70-399mm IS USM by $100. I got mine for $309 after rebate.
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Old Apr 9, 2012, 1:58 PM   #12
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After reading this: http://www.lenstip.com/8.10-Lens_rev...Autofocus.html I'm kinda thinking about a very cheap 18-55 and forgetting longer zoom lenses that aren't the L-series.
Looks like this Canon is good even with a TC however, so the optics must be good, but I need decent AF.
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Old Apr 9, 2012, 3:48 PM   #13
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A teleconverter will significantly decrease the AF performance of any lens.
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Old Apr 9, 2012, 4:11 PM   #14
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Quote:
Originally Posted by TCav View Post
A teleconverter will significantly decrease the AF performance of any lens.
I know, I know... I was just saying that if one lens is sharp with a TC and another is blurry, the one that is sharp probably has better optics.

A not-so-sharp lens may look good in a 6MP sensor at 100%, but may look blurred in a 36MP sensor for example, so, I think that in the future, the one that looks sharper with a TC will look sharper with higher resolutions sensors also.
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Old Apr 9, 2012, 4:47 PM   #15
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You also have to consider they tested that lens with a older body. Where the AF may not be as good, since it is date 9/2007.
this is a good read on the canon

http://www.the-digital-picture.com/R...ns-Review.aspx
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Old Apr 9, 2012, 4:52 PM   #16
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Quote:
Originally Posted by Electrolyte View Post
After reading this: http://www.lenstip.com/8.10-Lens_rev...Autofocus.html I'm kinda thinking about a very cheap 18-55 and forgetting longer zoom lenses that aren't the L-series.
Looks like this Canon is good even with a TC however, so the optics must be good, but I need decent AF.
That is why a L is a L. They are better that accounts allot for the added price.
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Old Apr 9, 2012, 5:41 PM   #17
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Unless you want to spend $1,500, the Canon 70-300 IS USM is the best there is. If you don't want to spend that much, the Tamron 70-300 VC USD is the best there is. If you don't want to spend that much, the Canon 55-250 IS is the best there is. If you don't want to spend that much, the Tamron 70-300 Di LD is the best there is.

What else do you need to know?
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Old Apr 9, 2012, 6:06 PM   #18
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Quote:
Originally Posted by TCav View Post
Unless you want to spend $1,500, the Canon 70-300 IS USM is the best there is. If you don't want to spend that much, the Tamron 70-300 VC USD is the best there is. If you don't want to spend that much, the Canon 55-250 IS is the best there is. If you don't want to spend that much, the Tamron 70-300 Di LD is the best there is.

What else do you need to know?
I really need image stabilization, so the last one is out of question.

I'll try to rent or borrow one (the Canon 70-300) to see what it looks like.

What about the Sigma 70-300mm OS? I know it's noisy but If the quality is good and the noise is not loud at the point of scaring birds at let's say, 5m, then it's okay.
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Old Apr 9, 2012, 6:17 PM   #19
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it is not as good as the canon or the tamron.
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Old Apr 10, 2012, 8:38 AM   #20
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Tokina used to make a reasonable priced 80-400mm, don't think it had stabilization though.
Might have been dropped, have not seen them in a long while.

Not sure why the need for stabilization unless you are in low light, I can manage a 600mm hand-held if I set the shutter to 1/1000 (at least for a few minutes before my arms fall off)
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Last edited by PeterP; Apr 10, 2012 at 8:44 AM.
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