You asked
What is the nikon af s dx 55 300mm f 4 5 5 6g ed vr good for?
The Nikon AF-S DX 55-300mm f/4.5-5.6G ED VR is a telephoto zoom for APS-C cameras. On those bodies it frames like 82-450mm on full frame, so it's really about reach: distant wildlife, sport, anything you can't walk up to. It's stabilised, which helps when you're handholding at the long end.
The trade-off is light. The maximum aperture narrows from f/4.5 to f/5.6 as you zoom in, so it's happiest in good daylight. On APS-C, the depth of field at 300mm is roughly that of f/6.8-8.4, which is handy for keeping a subject sharp.
It fits a wide range of Nikon APS-C bodies, such as the Nikon D5600 and Nikon D7500. If you want to work out the reach for other formats, Sensor sizes explains crop factor.
Written by Claude from this site's pages.