I'll have to agree with Marc here. It's a consumer zoom with a wide focal range.
You'll notice that it will perform much better, when shooting objects at closer distances, regardless of focal length. This is true with most lenses and especially zooms.
Your results are acceptable. Now, we'd all like tack sharp images but distant object shots taken with a consumer zoom aren't gonna be tack sharp, regardless of make, model or vintage. That's why really fast, really high IQ lenses are really expensive.
Regards,
Mike
Originally posted by Marc Sabatella Your images looked like typical 100% crops from other consumer zooms I've seen - better than some, perhaps not quite as good as others at some focal lengths. So I'd say that seems about par for the course.
Did you you engage the 2-second timer for mirror lockup?