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<blockquote data-quote="aroy" data-source="post: 308975" data-attributes="member: 16090">If you do not need to zoom in close, then primes would be better option. The 80-400 is at par with the 300mmF4 with TC1.4 as far as sharpness goes, but you get a much less expensive and lighter package with the prime, but there is no VR here.<a href="http://photographylife.com/reviews/nikon-300mm-f4d/4" target="_blank">Nikon 300mm f/4D AF-S Review</a><a href="http://www.bythom.com/300lens.htm" target="_blank">Nikon 300mm f/4 Nikkor Review by Thom Hogan</a>&nbsp;From what I have read, the latest 500mm F4 is the preferred lense for birding as it is lighter than the 600mm and has excellent IQ with all the TC.<a href="http://www.luminous-landscape.com/reviews/lenses/500vs600.shtml" target="_blank">500 vs 600</a><a href="http://www.dpreview.com/forums/thread/3617382#forum-post-53027677" target="_blank">Birding with a 500mm F4 or 600mm F4: Nikon SLR Lens Talk Forum: Digital Photography Review</a><a href="http://www.garryblack.com/ae22.htm" target="_blank">Which Lens for Wildlife; 400mm, 500mm or 600mm</a>As far as speed of focus and DR is concerned the FX cameras are better than the D7100. The least cost (and VFM) option is the D610, which has a 2EV advantage in DR, and should focus faster in low light.</blockquote>

[QUOTE="aroy, post: 308975, member: 16090"] If you do not need to zoom in close, then primes would be better option. The 80-400 is at par with the 300mmF4 with TC1.4 as far as sharpness goes, but you get a much less expensive and lighter package with the prime, but there is no VR here. [url=http://photographylife.com/reviews/nikon-300mm-f4d/4]Nikon 300mm f/4D AF-S Review[/url] [url=http://www.bythom.com/300lens.htm]Nikon 300mm f/4 Nikkor Review by Thom Hogan[/url] From what I have read, the latest 500mm F4 is the preferred lense for birding as it is lighter than the 600mm and has excellent IQ with all the TC. [url=http://www.luminous-landscape.com/reviews/lenses/500vs600.shtml]500 vs 600[/url] [url=http://www.dpreview.com/forums/thread/3617382#forum-post-53027677]Birding with a 500mm F4 or 600mm F4: Nikon SLR Lens Talk Forum: Digital Photography Review[/url] [url=http://www.garryblack.com/ae22.htm]Which Lens for Wildlife; 400mm, 500mm or 600mm[/url] As far as speed of focus and DR is concerned the FX cameras are better than the D7100. The least cost (and VFM) option is the D610, which has a 2EV advantage in DR, and should focus faster in low light. [/QUOTE]

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