As mentioned in other comments, you can use a more appropriate aperture here because f14 is too small and you'll suffer from diffraction as a result.
The reason it's a problem, is similar to when you squint your eyes. The light gets spread more than is ideal and the image will have reduced sharpness.
Ideally, you should try not to go beyond f11, as that's usually where most lenses will start to become effected.
It's worth noting that despite this, if you need a small aperture then don't be afraid to use it. The reduction in sharpness won't really notice until you get to larger print sizes, such as 1 x 1.5 metres.
Even then, it's much better to have a great photo without ultimate sharpness, than a super sharp photo that's boring or just bad. If you have the time, such as with non moving subjects, none of these things should happen. If your subject is moving, things get complicated quickly.
Sorry to go on a bit, I just wanted to bring some context and info to the subject of diffraction, as it's an important one, but once you know the whys and wherefores it's easy be aware of and incorporate into your workflow.