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Nikon DSLR Cameras
D7200
D7200/D9300 leaked? Possibly.
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<blockquote data-quote="aroy" data-source="post: 375557" data-attributes="member: 16090"><p>The AF works with aperture wide open. The sensitivity depends on what the maximum aperture is. Normally the AF is not reliable and slow beyond F5.6, which was the "Minimum" maximum aperture of a lot of zooms. Take the case of F4 telephoto - 300mm, 600mm etc. Now add a 2x teleconverter and the aperture wide open is F8. The 800mm F5.6+TC1.4 is also F8. Here is an interesting article</p><p><a href="http://www.lensrentals.com/blog/2009/01/teleconverters-101" target="_blank">LensRentals.com - Teleconverters 101</a></p><p></p><p>So having reliable AF at F8 means a lot of Super telephotos can now be used reliably (AF wise) with teleconverters.</p></blockquote><p></p>
[QUOTE="aroy, post: 375557, member: 16090"] The AF works with aperture wide open. The sensitivity depends on what the maximum aperture is. Normally the AF is not reliable and slow beyond F5.6, which was the "Minimum" maximum aperture of a lot of zooms. Take the case of F4 telephoto - 300mm, 600mm etc. Now add a 2x teleconverter and the aperture wide open is F8. The 800mm F5.6+TC1.4 is also F8. Here is an interesting article [url=http://www.lensrentals.com/blog/2009/01/teleconverters-101]LensRentals.com - Teleconverters 101[/url] So having reliable AF at F8 means a lot of Super telephotos can now be used reliably (AF wise) with teleconverters. [/QUOTE]
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Nikon DSLR Cameras
D7200
D7200/D9300 leaked? Possibly.
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