Sigma 18-50mm not quite 50mm?

Started Aug 16, 2005 | Discussions thread
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THP Regular Member • Posts: 294
Sigma 18-50mm not quite 50mm?

I tested this lens at 50mm against my 50/1.4, and the Sigma is considerably shorter. I also tested the Sigma at 18mm against my kit lens at 18mm, and they are the same. So, this leads me to think that the Sigma at 50mm is really closer to 40-45mm. Can someone verify this?

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