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Old Oct 7, 2010, 3:56 AM   #1
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Default Image stabilization vs. constant aperture

I have difficulty in choosing the right tele lens for a Canon 550d.....(film + photo)
What's better for (amateur) filming. The subject will also be windsurfing at sea.
The Canon 70-200 f4 (non IS) or the (new) Tamron SP70-300 f4-5.6 with stabilization (VC) but not with constant f.?
For sports photography I think the Canon is the better choise but it doesn't have IS what's recommanded for filming... and the IS version is to expensive for me.


For the wide angle I probably go for the Tamron 17-50 f2.8 but also in doubt about VC or not.
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Old Oct 7, 2010, 5:09 AM   #2
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For sports/action, you need to use fast shutter speeds to prevent motion blur due to subject movement. Those same fast shutter speeds will also prevent motion blur due to camera shake, so image stabilization isn't really necessary for that.

The Canon 70-200/4.0 is a very good lens, but will it be long enough for what you want to do?

The unstabilized Tamron 17-50/2.8 is also a very good lens, but the stabilized version isn't as good.
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Old Oct 7, 2010, 5:20 AM   #3
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but will the Canon also be good for filming (on tripod)?

and..how disturbing is a lens with a variable aperture for filming?

On what points is the VC version of the Tamron 17-50/2.8 not as good as the non VC?

Thanks for your reply
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Old Oct 7, 2010, 5:36 AM   #4
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The VC version of the Tamron 17-50/2.8 has a lot more vignetting and isn't as sharp as the non-VC version.

See:

Tamron 17-50mm f/2.8 XR Di II LD Aspherical IF SP AF (Tested)
Tamron 17-50mm f/2.8 XR Di II VC LD Aspherical IF SP AF (Tested)

The only really good, stabilized, large aperture standard zoom is the Canon EF-S 17-55mm f/2.8 IS USM (Tested), but it's $1,060!
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Old Oct 7, 2010, 7:29 AM   #5
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Quote:
Originally Posted by stapel View Post
but will the Canon also be good for filming (on tripod)?

and..how disturbing is a lens with a variable aperture for filming?

On what points is the VC version of the Tamron 17-50/2.8 not as good as the non VC?

Thanks for your reply
as i understand it your not supposed to use image stablisation when shooting from a tripod - it is there for correcting hand holding shake - vibration from tripod use is something different and using imagestablisation will infact likely result in a less sharp images

so for shooting from a tripod your better off with the canon lens - for when you are taking still images without a tripod hmmmm really depends what your taking pics of - the difference in aperture from f4 to f5.6 isn't that huge so if your taking pictures of slow moving or static objects then the image stablisation would likely serve you better - for fast moving objects where you need the faster shutter to freeze action then the faster aperture is better

another thing is of course the focal length - 300mm is quite abit more than 200mm so it is potentially more versatile specially for shooting windsurfers which are likely going to be a reasonble distance from you

if image quality was equal i would probably go with the tamron for the extra reach it provides and the image stablisation for handholding shots - the difference of shutter speed at maximum focal length isn't to great and it might be worth checking to see when the tamron switches from f4 to f5.6 - it might be at 200mm then you essentially have a constant f4 from 70-200 same as the canon but with an extra 100mm at 5.6 - all that said the canon lens has a pretty good chance of being a better optical performer
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