Will the nikkor work with the nikon D3100?

Every Nikon lens made since 1977 works on every Nikon being made currently. It's a great walk around lens but it's a little heavy. The weight makes it easier to shoot with though since you have to use a good two-handed grip.

18-200mm vs 18-300mm - which one would you suggest?

Depends on what you are planning to use the lens for. If you are into wildlife photography then you may need the 18-300.The 18-200 is a pretty compact lens while the 18-300 is huge and weighs about 10 more ounces. Check out this link to see the relative sizes..........http://kenrockwell.com/nikon/comparisons/DX-super-zooms/index.htmAs far as Leon's criticism of this lens is concerned I would definitely not call this a poor lens. Just keep in mind that as with any superzoom there are compromises that have to be made. It would not be fair to compare the sharpness of this lens with a prime lens or with a pro quality zoom lens like the 24-70 f/2.8. So if you are into pixel peeping you will be disappointed. This is a good walk about lens that lets you capture a variety of scenes without having to change lens. This is not a fast lens and needs good lighting to capture good photographs. In summary if you are looking for a portrait lens look elsewhere but if you are looking for a lens that you can travel with and capture vacation memories then the flexibility that this lens provides you is excellent.

does this fit on a D 5300 Nikon

Yes. I use in on a 5100 and 5500.

How does this lens compare to the Nikon 18-105mm f/3.5-5.6 AF-S DX VR ED Nikkor Lens that comes as the kit lens with the D90?

i use both the 105 and the 200 and my 200 is my go to every day lens. both are good but i just prefer the 200. hope this helps. distortion is equal on both lens so no real differences noted.

ASIN	B002JCSV8A
Batteries	1 Lithium Ion batteries required.
Best Sellers Rank	#943 in SLR Camera Lenses
Customer Reviews	4.5 4.5 out of 5 stars (1,149)
Date First Available	July 29, 2009
Is Discontinued By Manufacturer	No
Item Weight	1.25 pounds
Item model number	2192
Manufacturer	Nikon
Product Dimensions	3.82 x 3.03 x 3.03 inches

AF-S DX Nkr 18-200mm F/3.5-5.6G ED VR II

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