Definition-
A camera lens is composed of multiple lens elements assembled and fitted together in a tube called a lens barrel. This photographic lens is known as an "objective" or compound lens<20mm~Super wide angle
24mm-35mm~Wide angle
50mm~Normal lens
80mm-300mm~Tele
>300mm~Super tele
A prime lens- has a fixed local lens that does not change, generally the quality is much higher while zoom lenses offer more flexibility. A zoom lens allows the user to alter the focal length
Focal length- The focal length of the lens is the distance between the lens and the image sensor when the subject is in focus, usually stated in millimetres (e.g., 28 mm, 50 mm, or 100 mm). In the case of zoom lenses, both the minimum and maximum focal lengths are stated, for example 18–55 mm.
Wide angle lenses -(short focal length) capture more because they have a wider picture angle Telephoto lenses (long focal length) have a narrower picture angle
Standard Lens-A standard lens will reproduce what our eyes see, but this does not include out peripheral vision, and they are in the focal range of 35mm-70mm. When film is being used 50mm is closest to what our eye sees, so this would be considered normal. However, when using digital, 35mm for APS-C or cropped sensors is what is required in order to get the same field of view. If you go wider than this it would be a wide angle lens, and the smaller the number for the focal length the wider the lens will be.
A longer focal length is associated with larger magnification of distant objects, and a narrower angle of view. A shorter focal length is associated with a reduction of objects and a wider angle of view.
An example of how lens choice affects angle of view, these photos were taken b a 35mm camera at a constant distance from the subject
Telephoto definition-
Telephoto lenses are best known for making distant objects appear magnified, they magnify the images by "pulling" them closer to you. As a result they also magnify vibrations from your trembling hand and when pressing the shutter and this can result in blur or fuzzy pictures.
Wide angle definition-
Wide-angle lens are the opposite of the telephoto lens, it provides a broader field of view than the human eye, it can be used to take picture of a wide subject in a tight spot. Wide-angle lens deepens space; it makes everything seem further away from the camera, it also deepens or increases depth of fields.
This photo is an example of a wide angled photo, because of the wide angle that has been used, it allows the viewers to see a very large broad area. So in this photo its got the bridge as the centre of the photo which has given the photo a leading line, so it draws the viewers eyes to the bridge which eventually leads to the trees. I choose this photo because I liked how much the bridge stood out from the rest of the photo, as everything else is green or white, so as the red is quite vibrant it just gets your attention. Also the over exposure which has been done on purpose adds to the photo because it shows the red and green more than if the sky wasn't over exposed, otherwise if the sky was blue then the red and the green would not have as much effect.
Straight images
These photos were taken in my brothers bedroom because I thought it had the best background to try depth of field experiments on, and for the context of the photo as it was a photo of my brother I thought it would make more sense in his bedroom with all vibrant colours to give of a happy mood. When I first tried this he wasn't really cooperating so I had to wait a couple of days to get a tripod so that the movement was minimal and he so he was in a better mood and would stay still. When I first tried this experiment without a tripod I found it difficult to not get blur when I increased the aperture, especially when it was above f18, however I did have a slow shutter speed whilst I was doing it because I found it time consuming and difficult to try and get a faster shutter speed and not have a complete blacked out photo, and as Alex was restless I didn't really have time to be sorting it out. When I got a tripod I was able to complete a series from F4 to F20 with a high ISO of 1600, but this was because of the time of day and the colour of his room was dark even though it doesn't really appear to be, I started taken photos of him sitting but he eventually laid down which made it easier to see the background, so when I started at F4 I had a shutter speed of 1/40 but it managed to decrease to 1/1.6 as I had my setting on aperture priority, but because of the tripod the shutter speed didn't really have that much effect on the photos, however in the last couple of photos his blink is captured but at least his whole body isn't moving. Throught this even though I changed my aperture gradually from F4 to F20, which is quite a lot, I wasn't really impressed with the outcome of the depth of field dramatically changing. Because I was expecting his poster in the back to go blurry but it didn't, however you can still see the difference in what aperture does, so even though the depth of field didn't completely switch I'm still happy with it because it helped me on how the find the right aperture. If I was to do it again, I wouldn't take the photos in Alex's room because I think that the lighting didn't really help somehow, because its hard to se a distinction as the whole background and foreground is too similar to me, I need somewhere that has a set background like a simple wall. or outside with far away trees.
