ISO Photographs

Aperture is the hole of the camera lens,  this is adjustable it controls how big or how small the lens can be. The larger the the hole, the more light gets in, this is needed when the lighting conditions are dark for example at a gig. The smaller the hole, the less light gets in, this is needed when the lighting conditions are bright. The depth of field is changed when the aperture changes.
The first image here was taken on a aperture setting of about f3.5, as you can see the foreground is only focused and the background its still blurred, this is because this is a larger depth of field so the lens is at its biggest, therefore can only focus on the front image which is the handcuffs. Gradually throughout these photos they start to become more focused as the depth of field becomes thinner, resulting in a more focused image.
The second image has been taken about f9, as you can see my model is staring to become more in focused. And then eventually the last image the majority of the image is in focus as this was a aperture setting of f22, which is the smallest hole the lens can create.