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Teleconverter question
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<blockquote data-quote="hark" data-source="post: 746039" data-attributes="member: 13196"><p>And for the record, the Nikon 1.4x teleconverter only loses 1 stop of light. Not sure if a Sigma TC would offer the same amount of light loss or if it would be more. <em><strong><u>EDIT</u></strong>: Just found the info in the link below that the Sigma 1.4x TC has 1-stop of light loss. </em></p><p></p><p>So I did a little digging and found this Sigma link for TC's:</p><p></p><p><a href="https://www.sigmaphoto.com/lenses/lens-resources/teleconverter-compatibility" target="_blank">https://www.sigmaphoto.com/lenses/lens-resources/teleconverter-compatibility</a></p><p></p><p>If you have the Sigma 100-400mm F5-6.3 DG OS HSM Contemporary lens, it looks like the Sigma TC-1401 will allow the AF to work on cameras with the f/8 support, BUT there is an *6 next to it. Looking at the footnote, it states</p><p></p><p><strong><em>*6 When it is attached to cameras that are compatible with AF at F8, focus accuracy is not ensured on the telephoto side at the focal length scale more than 200mm.</em></strong> </p><p></p><p>The Sigma TC-2001 (probably a 2x TC) lists that lens as being manual focus.</p></blockquote><p></p>
[QUOTE="hark, post: 746039, member: 13196"] And for the record, the Nikon 1.4x teleconverter only loses 1 stop of light. Not sure if a Sigma TC would offer the same amount of light loss or if it would be more. [I][B][U]EDIT[/U][/B]: Just found the info in the link below that the Sigma 1.4x TC has 1-stop of light loss. [/I] So I did a little digging and found this Sigma link for TC's: [URL]https://www.sigmaphoto.com/lenses/lens-resources/teleconverter-compatibility[/URL] If you have the Sigma 100-400mm F5-6.3 DG OS HSM Contemporary lens, it looks like the Sigma TC-1401 will allow the AF to work on cameras with the f/8 support, BUT there is an *6 next to it. Looking at the footnote, it states [B][I]*6 When it is attached to cameras that are compatible with AF at F8, focus accuracy is not ensured on the telephoto side at the focal length scale more than 200mm.[/I][/B] The Sigma TC-2001 (probably a 2x TC) lists that lens as being manual focus. [/QUOTE]
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