I used 70 300mm DG Macro lens on my nikon 5100 in my intial days. its okay lens on sharpness wise but it will be very difficult to shoot at 300mm. i used to shoot moon handheld with this lens( i dont have tripod at that time), 1-2 shots out of 10 looks good, use a tripod for better results. Miniature effect it gives in macro mode is really good.
Why would it give a miniature effect in macro mode? It doesn't have a tilt/shift function.