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Old Mar 13, 2013, 6:43 PM   #31
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Originally Posted by Krichton View Post
I believe basic Nikon lenses are 3 stops, but Canon uses 4 in all their lenses, from what I can tell. I believe if you buy Sigma or Tamron they're mostly, or all 4 stops.
According to the SLRGear IS Test of the Canon 18-55, the IS gives a 2 stop benefit at 18mm and 3 stop benefit at 55mm. Similarly, the Canon 70-200/2.8 II gives 4 stops at 200 but only 3 at 70. And the Canon 18-135 give 4 stops at 135, but just 1 stop at 18.

Also, Nikon's 16-35 gives 3 stops at 35mm but only 1 stop at 16mm, the 18-300 gives 3 stops at 300 but just 1 at 18, the 24-85 gives 3 stops at 85 but just 1.5 at 24, and the 55-300 gives just 1 stop at 300 but 3 stops at 55.

The Sigma 50-150/2.8 gives about 2.5 stops at 50mm and 3.5 at 150mm, the 17-50/2.8 gives 2 stops at 17 and 3 at 50, and the 105/2.8 Macro and 150mm f/2.8 Macro give about 2.5 stops each.

The Tamron 70-300 has a 1 stop advantage at both 70mm and 300mm, as does the 18-270 at both 18 and 270.

So, while anything is better than nothing, it's not 4 stops, or even 3, all around.

Quote:
Originally Posted by Krichton View Post
Can you use the IS on third party lenses on pentax cameras instead of sensor shift?
You can switch off the IS in Olympus, Pentax and Sony bodies, just like you can switch it off in Canon, Nikon, Sigma and Tamron lenses.
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Old Mar 13, 2013, 7:12 PM   #32
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Interesting, I didn't realize that.
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Old Mar 14, 2013, 4:53 AM   #33
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That doesn't include all the unstabilized lenses for Canon and Nikon bodies that would be stabilized on Olympus, Pentax and Sony bodies.
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