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Soft image from 70-200 f4 IS

Started Jul 10, 2016 | Discussions thread
RS_RS Senior Member • Posts: 1,788
Re: Soft image from 70-200 f4 IS

This is in principle an outstandingly sharp lens under almost all circumstances, although it is a bit weak at 200mm MFD. All the reviews that I have seen agree on this, and it has certainly been my own experience with my copy. However, my son bought one s/h that was disappointing, but Canon at Elstree (UK) sorted it out and it is now fine – we think there may have been an internal misalignment.

So, the fist thing to do is to test your lens properly – apart from anything else, DoF issues make it hard to draw any conclusions from the images you have posted. Use Live View to obtain accurate focus on a detailed flat subject perpendicular to the lens axis, like a building with plenty of fine architectural features. That will tell you whether the problem is with your lens. If it is, send it to Canon in the hope that they can sort it out.

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