Holding by hand
I will post some well known techniques that I have found searching around (I am not a good teacher) and here is the first one.
A somewhat well-known rule in photography is that you can hold a camera by hand if the shutter speed is shorter than about the inverse of the focal length used (t < 1/f). So, if you'd use a 50mm standard lens to photograph a scene, you could handhold the camera when taking a picture if the shutter speed is about 1/50 second or shorter. If you use a too long exposure time without a tripod, the photo will appear to be blurry.
This rule works fairly well, although with a bit of practice (holding a camera steady) you can usually do better. For example, by not holding your breath but rather slowly exhaling while taking a photo you will cause less camera shake. Also, by firmly supporting both arms by your torso, the camera will be more steady.
I have found this well written tips on the web and I thought I needed to post them here, enjoy.












