I bought my first DSLR [Nikon D3100] with standard 18-55 mm F3.5-5.6 lens.
Now as per my understanding, I should get aperture of only F3.5 to 5.6
However, while at get only at most F/3.5 in lower range, I do find I can go far beyond F/22 in upper range.
How can it be possible?