wolvesaywe Loc: Hants England

A great recommendation , I also use one on my D7200 for airshows and motor sport and the occasional wildlife. Great results

jeffhacker Loc: Dallas, Texas

Interesting information, but, for most of us amateurs (including advanced amateurs), a strong consideration is cost, and portability. For me, that makes the 18-300 a good trade off to use with my D7200. I also have a 50 mm f/1.4 prime lens, but I rarely use it. Just another piece of equipment to carry.

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Gene51 Yes I am aware of the differences in the sensors. If The 18-300 mm f/4.5-5.6 was ever tested on an D810 body I believe it would do poorly. I never thought of calculating percentages but I like your approach.
Dave

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guyaurora: I gave your situation some more thought and I am guessing you have a DX framed camera. If I were in your situation I would go to eBay and buy a D800e(the most resolution for the dollar) FX body or the D810. They have a 36.3 MP sensor and will not increase the size of your camera bag. This will use the whole lens not just the center 2/3 and double the resolution of your existing 70-200 f/2.8 to 20 MP allowing crops with it comparable or better in sharpness to a 300mm lens.

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guyaurora: If I was going to Africa I would take my Nikon Monarch 8.5 x 56 binoculars. I was so impressed with their performance I bought the 12 x 56s as well. They so out performed any thing else I have ever used by a wide margin they spoiled me. Don't buy the 12 x 56 or the new 20 x 56s as they are difficult to hold still unless you sit in a stable chair or use a tripod. I Know it's another peace of gear to lug around but you will be glad when you see what they a capable of. I can't describe it you will have to see for your self.
http://www.ebay.com/itm/Nikon-Monarch-8-5-x-56-Waterproof-Fogproof-Binoculars-with-Case-low-light-/201806777229?hash=item2efc9f0b8d:g:AjMAAOSwo4pYlfD~
http://www.nikonsportoptics.com/en/nikon-products/binoculars/monarch-5-8x56.html#tab-ProductDetail-ProductTabs-TechSpecs