20D, sigma 18-50/2.8 & sigma 500 super focus assist

Started Feb 16, 2005 | Discussions thread
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dougr
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20D, sigma 18-50/2.8 & sigma 500 super focus assist
Feb 16, 2005

noticed in another thread someone saying 18-50/2.8 will not work with the 500's focus assist lamp. is this a common problem? i was under the impression that the 500 super was the solution to sigma lenses not working with the canon external focus assist lamps? this doesn't hold with the 18-50/1.8?

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