Following the surprisingly popular (and official) Canon lens mugs that appeared recently, we now have unofficial Nikon versions surfacing on eBay:
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Nikon Lens Mugs Available On eBay
Nikon D5000 - A Beginner's Experiences
5 (Or More) Things You Didn't Know About Nikon
Top Tips: Photographing Children
What's the shutter actuation count of your DSLR?