I have used this lens on my Canon 5D3 for many years as a wedding photographer. I doubt if any of my clients suffered from me not using the Canon lens. This lens was 1/3 the price of the Canon at the time. This was my main wedding workhorse lens and has stood up to 100's of weddings. Can';t fault it. Now 2021, I have sold my 5D3 and got a Sony A7R3. I have the Sigma MC11 adapter and the Tamron lens works well on the Sony. I still have good autofocus and even eye detect. Maybe I can get a Sony lens to replace it one day but I would have to spend over $1000 Au.
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