Do you think there is much difference at 250mm? i have checked the different lens test sites like digital picture etc, but they only show whole drops in lens size - 300/200/100mm etc i know 200mm is very good at the center and similar from f5.6 - f8, with my needs 250mm is just about liveable in size with the crop mode in the d7100 and a bit on top of that after in pp, 200mm would be to small i feel.
P.
I couldn't tell you what she does at 250mm since those ranges are rarely tested. All I can tell you is that I took plenty a shot with the 70-300mm on my D3300 and never complained about a lack of sharpness. From 70 to 300mm. I cropped all of those lengths and never complained. Btw, don't shoot crop mode unless you need more buffer or require smaller sized files. It doesn't improve the shot in any other way. That aside the 70-300mm's sharpness won't be the same when I use her now on my D750 but there are more reasons for that.
You have to understand sharpness is addictive. At start you have a good lens and she takes a good shot and you consider her pretty sharp and all is well. But you get used to that sharpness and in time, pay little attention to it. Until you shoot a lens that's obviously sharper.
Now suddenly your previous feels like you're trying to cut meat with a broomstick. That new sharpness becomes your
standard sharpness and nothing less will satisfy you. You'll get used to this new sharpness too. Until you again shoot something sharper. It's a very costly addiction and there's no going back.
I did consider the 70-300mm sharp and I was also one of those that wondered why some people considered the Tam 150-600mm a bit soft. Ironically now I've become one of those people.
Don't worry too much about sharpness. If you think your lens takes a good and sharp shot, she does. And there's always software to improve upon that sharpness.
If you think she should be sharper, that's true too but we all think that about each of our lenses.
