At present I have an EF 400mm f5.6L which I use mainly for bird photography. I really don't have any problems with camera shake in terms of image blur because of the higher shutter speeds I use, however when trying to focus on a very small object the exaggerated movement associated with a 400mm lens means it is difficult to keep the AF spot on the target which results in quite a few oof images. I also use an Olympus E-M5 with it's 5 axis in-body IS and this stabilises the image in the viewfinder (electronic) very well, even at 400mm +, to enable me to keep the AF spot in place. Am I right in assuming that a Canon IS lens will have the same beneficial effects with the optical viewfinder? Excuse my ignorance on this but I have only ever used IBIS.
Many Thanks
David
Many Thanks
David
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