Negative Positive
Title: Not good for wide angle zoom position
Review: I purchased this extension tube so that I could take close-ups of food using the wide end of my T3i 18-55mm lens. That lens only focuses to 25 cm (9.8") and in auto focus only to 28cm. But with the tube in place, at the wide end of the zoom I have to bring the camera within a couple of cm to the subject, which is far too close. The only way to use the tube is on the long end of the zoom, which removes the effect I was working to: the exaggerated foreground.Note too that this lens does not speak to the camera when the tube is installed: you have to manually focus and manually set iris, both of which are relatively easy to do with Magic Lantern installed on the camera.With great regret I am returning the tube. I will have to try a diopter on the front of the lens, though I fear image degradation.
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