My D3300 came with two kit lenses, the 18-55mm and 55-200mm. My experience with lenses is limited to these two zooms.
A couple months ago, I got a Nikon (Nikkor) 50mm f/1.8 prime. I expected to be wowed by it's speed, which is indeed nice, but am having some issues with focus. My problem is that I'm not versed enough in lenses to know if my issues are my fault or due to the lens itself. The focus is nowhere near as crisp as I expected; a sharp image is more the exception than the rule, which is very disappointing. I get better, and more dependably sharp, shots with my kit lenses, but is that due to using smaller apertures?
Today I received a set of cheap 58mm Vivitar close-up filters sized to the 50mm, otherwise identical to the 52mm Vivitars close-ups for my kit lens. Now, the set for my kits focuses just fine and the biggest compromise is expected color aberrations (after all, a set of 4 is only $10USD). But the focus point on the 50mm prime with the filters shifts WAY off center, where I set my focus point. Does this mean something is wonky with the lens?
Is it me, or is this something I should send my lens in for repair while it is under warranty? I feel like a brand new driver trying to figure out if I've just bought a lemon car. Not enough experience to judge where the issue lies.