Aperture affects depth of field (focus area in your photo). Reducing the aperture (increase the number, for example you choose f/22) will add depth of field, meaning a sharp areas in the bigger picture will include objects near and far, so the sharpness of the picture as a whole actually decreased. So do otherwise, choose a large aperture (small number, eg f / 4), then you will focus sharply only near the focal area.
ISO
Adding ISO will speed up the shutter speed and lets you choose a larger aperture. If you take pictures in the room, larger was the ISO, but do not overdo it (ie: select ISO 600 for shooting inside the house). Select the ISO is too high (above 800), can cause noise (small black spots) in an image starts to look.
Focus
Do not just believe with autofocus camera, check carefully to use the eyes in the eyes of your focal point is located. When photographing the face at close range, make sure the focus falls on the bull’s eye. When photographing an object, make sure the focus was there where you want the sharpest area. Autofocus camera could be wrong and it dropped the focus in addition to objects that you want.
Lens
If you happen to have a SLR camera, choose the best lens you can buy. The lens of good quality can drastically improve the sharpness of your photo. KIT lens that is usually offered for sale as a complete package with the camera is usually the quality of his effort. Do not buy a package of KIT. Lens with good quality is usually characterized by a large aperture (eg f/2.8).
Sweet Spot Lens
The lens has its sweet spot respectively. Sweet spot is certain where the lens aperture will produce the sharpest images. Sweet spot lens two stops are usually located above the maximum limit the ability of the lens aperture. For example, f/2.8 lens for the sweet spot was on the f/5.6. So if you use f/5.6 aperture lens taking pictures with it, your photo will be sharp razor-sharp.
Tripod
Tripod is impractical and inconvenient, but if you are “willing to” bring it, you’ll get sharper photos. Especially if you want to generate HDR or panoramic photos, just let it go bring a tripod.
Aperture
