Question about Sigma Zoom Telephoto 170-500mm f/5-6.3 APO Aspherical Autofocus Lens for Canon EOS
There is a website devoted to Err99: http://www.richardsnotes.org/archives/2005/04/29/50mm-lens-contact-points/
I have a Quantaray 100-300 which also displays an Err99 when used in automatic mode. The only way I can use this lens is in AV mode and select the widest aperture.
Posted on Jan 24, 2008
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Posted on Jan 02, 2017
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