I'm relatively new to photography, and just made my first lens purchase beyond the kit lens for my D5000, Nikon's 35mm f/1.8 G. It works great for the most part, but I noticed looking down the barrel that the aperture isn't quite symmetric when it is open most or all of the way. Sometimes one of the blades even pokes its sharp end inside a bit, making the bokeh bumpy. I took pictures of an out-of-focus LED to show you:
Obviously this will not be a factor in the vast majority of photos, but if there are isolated background lights it could be noticeable. The aperture seems to work great otherwise, it goes to whatever size I want it to as far as I can tell.
My question is: is this lens defective, or am I expecting too much perfection from a $200 lens?
Thanks for your help, I don't have enough experience to know what to think about this.