I have been using my camera (Nikon D5100) for around 5 years. Recently I am facing an issue when I use the kit lens. If I take a group photo (of a group of people) standing not very far from them, the autofocus works well but after clicking if you examine the image by zooming in, it shows that none of the persons in the photo are in focus. It keeps happening.
But If I zoom on anyone and then click, it works fine even though I maintain the same distance from object.
So I decided to zoom first and once I got the proper focus after zooming, then I change the mode to Manual (hoping that focus remains locked) and zoom out and take the pics. Unfortunately, it goes wrong again as I mentioned in the first case.
What could be the issue here? anyone has any input?