I have this lens I got when I was very new to photography. It’s a Sigma 70-300mm. As I learned more about photography and my artistic voice developed, I became partial to Nikon’s prime (fixed focal-length rather than zoom) lenses, so I hardly ever used it. I didn’t think it would be compatible with my full frame D700 when I upgraded last year, but I used it so seldom that I didn’t even look to make sure. I almost sold it. Then, I realized that it has macro capabilities- something I have been wanting quite a lot. And indeed, it is compatible with my newer camera. So yesterday I took it for a spin in the park… and it’s almost like I got a brand new lens- from my own camera bag.