get more telephoto reach
When you need to really cover the distance, you’ll need to upgrade your telephoto lens
Sometimes a single kit lens with a new camera just isn’t enough, and dealers often tempt you with a bonus telephoto zoom to seal the deal. With Nikon DX cameras, the bonus lens in question is likely to be the AF-S DX 55-200mm f/4-5.6G IF-ED, or the newer Mk II edition that features the same retractable design as the 18-55mm VR II kit lens.
Thanks to the 1.5x crop factor of DX format cameras, the maximum effective focal length is a useful 300mm. However, if you upgrade to an FX-format 70-300mm lens, you’ll get a massive effective telephoto reach of 450mm. This rivals the range of a big super-telephoto lens on an FX camera, while keeping size and weight well under control.