jxs1984 wrote in post #10110901
After trying out the 70-200mm f/4 IS and the 70-200mm f/2.8 IS you could really feel the IS kicking in. Seeing the super smooth motion through the viewfinder put a big grin on my face.
I was wondering if there are other lenses like this? My 18-55mm IS doesn't feel like theres IS in it.
That's because you don't notice the vibrations in the viewfinder as much with an 18-55mm lens. With a longer telephoto, even small vibrations can easily be seen through the viewfinder. If you tried out a 300 or 400mm lens with IS, it would be even easier to see the stabilizing effect in the viewfinder.
The perceived "strength" of the IS is more a function of the lens' focal length than anything. Most modern IS units offer 3 or 4 stops of stabilization, so they all pretty similar performance-wise.
Also keep in mind that the 18-55 is a compact lens without any large glass elements inside, so the IS system is much more compact. As a result, you probably won't be able to feel the IS elements moving. With a larger telephoto, on the other hand, you're much more likely to hear and feel the IS system kicking in. That doesn't mean it's more effective, just that there is more glass being moved around to stabilize the lens.