I have been out taking some evening photos (just after sunset) and I have noticed that in a number of instances the higher f numbers ( 14+ ) are appearing more blurred than the lower f numbers ( < 14). I use a tripod and take a wide range of photos so I have been comparing the same photo with different f stops.
I am using a Nikon D3000 and begin by framing the photo and then setting the F Stop and adjusting the apature based upon the meter on the camera display. I use a tripod so I was expecting the majority of images to come out sharp. I was wondering if I may have set the F stop too high and not let enough light in.
For example, a photo taken at 62mm focal length at f/14 is appearing more sharp than an image taken at the same focal length and at f/22.