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Query on lens repair 100mm f/2.8

Started Aug 20, 2020 | Questions thread
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DGhosh New Member • Posts: 17
Query on lens repair 100mm f/2.8

I recently gave my 100 mm f/2.8 for repair to Canon customer care as the autofocus had stopped working. They replaced the af drive and a lens element from the 4th group. After receiving the lens the focus locked but results were not sharp. I returned it to the Canon guys explaining the issue. They fixed it and I collected it yesterday. Now the AF is accurate from 30 cm till about 10 feet where I can get half body shots. For greater distances the AF locks on but the subject is not tack sharp.

Has anyone dealt with this issue ? How should I explain it to the repair technician?

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