A:Answeryes, we are using this lens with the Nikon D40. While the Tamron lens won't compete with the best of what professionals use, it's an incredibly good and flexible lens for amateurs.
A:AnswerCheck the electrical contacts first. clean if any corrosion is evident. 2nd check bayonet mount groves for debris and third make sure your battery is fully charged.
then check if vibration damper is in correct setting. haven't had a problem.
But sticking to basics usually will narrow down the problem. That has been my method over the years. Good luck.
