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1.4 or 2 X teleconverter
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<blockquote data-quote="Don Kondra" data-source="post: 274654" data-attributes="member: 17688"><p>Geez Jonathan,</p><p></p><p>With all due respect all I can critique is your technique and point out the 18-300 mm is a DX lens, the 70-300 mm is FX. </p><p></p><p>I applaud your willingness to help out but showing out of focus shots with bad metering and poor posing isn't helping your case.</p><p></p><p>Birders in general are looking for reach while maintaining a certain level of detail in the bird.</p><p></p><p>None of your images meet this criteria and having to use manual focus to boot, well....</p><p></p><p>I found this article interesting > <a href="http://photographylife.com/image-degradation-with-nikon-teleconverters" target="_blank">Image Degradation with Nikon Teleconverters</a></p><p></p><p>To summarize, test lens was a 70-200 mm f/2.8 on a D800E. </p><p></p><p></p><ol> <li data-xf-list-type="ol"><strong>Nikon TC-14E II – 5% Sharpness Loss</strong></li> <li data-xf-list-type="ol"><strong>Nikon TC-17E II – 17% Sharpness Loss</strong></li> <li data-xf-list-type="ol"><strong>Nikon TC-20E III – 26% Sharpness Loss</strong></li> </ol><p></p><p>So, Lawrence. </p><p></p><p>The 70-300 mm isn't even on Nikon's Teleconverter Compatibility chart.</p><p></p><p><a href="http://www.nikonusa.com/en_INC/IMG/Assets/Common-Assets/Images/Teleconverter-Compatibility/EN_Comp_chart.html" target="_blank">http://www.nikonusa.com/en_INC/IMG/Assets/Common-Assets/Images/Teleconverter-Compatibility/EN_Comp_chart.html</a></p><p></p><p>With the 2x I believe you will be @ F/7.1 so auto focus may be available in good light on the D5100.</p><p></p><p>Beg, borrow or rent the 1.4x and/or a 1.7x and see what you see <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Cheers, Don</p></blockquote><p></p>
[QUOTE="Don Kondra, post: 274654, member: 17688"] Geez Jonathan, With all due respect all I can critique is your technique and point out the 18-300 mm is a DX lens, the 70-300 mm is FX. I applaud your willingness to help out but showing out of focus shots with bad metering and poor posing isn't helping your case. Birders in general are looking for reach while maintaining a certain level of detail in the bird. None of your images meet this criteria and having to use manual focus to boot, well.... I found this article interesting > [URL="http://photographylife.com/image-degradation-with-nikon-teleconverters"]Image Degradation with Nikon Teleconverters[/URL] To summarize, test lens was a 70-200 mm f/2.8 on a D800E. [LIST=1] [*][B]Nikon TC-14E II – 5% Sharpness Loss[/B] [*][B]Nikon TC-17E II – 17% Sharpness Loss[/B] [*][B]Nikon TC-20E III – 26% Sharpness Loss[/B] [/LIST] So, Lawrence. The 70-300 mm isn't even on Nikon's Teleconverter Compatibility chart. [URL]http://www.nikonusa.com/en_INC/IMG/Assets/Common-Assets/Images/Teleconverter-Compatibility/EN_Comp_chart.html[/URL] With the 2x I believe you will be @ F/7.1 so auto focus may be available in good light on the D5100. Beg, borrow or rent the 1.4x and/or a 1.7x and see what you see :) Cheers, Don [/QUOTE]
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