INVEST IN NEW KIT!
The most obvious contender for getting upgraded is the lens that you use most, for day-to-day shooting
Whether you’ve bought a DX- or FX-format Nikon D-SLR, you might well have bought it as a ‘kit’, complete with standard zoom lens. Nikon kit zooms are pretty good on the whole, ranging from the dinky little 18-55mm VR II and bigger 18-105mm VR DX-format zooms to the 24-85mm VR FX-format lens that’s offered with the D610 and D750. They’re great for getting you started.
However, unless they’re paired with the most inexpensive entry-level bodies, you can’t help but feel these kit lenses are comparatively lacking in sophistication and overall quality. They’re not constant-aperture designs and have disappointingly narrow maximum apertures of around f/5.6 at their longest zoom settings. The DX-format kit lenses don’t even have a focus distance scale. But there is another way...