We recently have been learning about lenses and how they work with aperture, shutter speed and also exposure. We learnt about focal length and how it is calculated. We also discovered that lenses also aid focus and zoom of an image. there is also a variety of things we learnt about different types of lenses which were,
- Often in modern cameras we use convex lenses which are thicker in the middle than at the front. This helps to have a better zoom and focus on the image which makes the image clearer and sharper. It also means that you can capture an image from a variety of different angles.
- Once light rays are concentrated and it is focused they are projected onto the focal plane. In a DSLR this would be the mirror that would reflect the image up into the viewfinder. The mirror flips the image and inside the camera it appears upside down but because our cameras work like our eyes, our brain instantly flips the image up right.
- Types of lenses are often referred to by their focal length for example, 50mm or 28m or in terms of relative focal length (normal, short or long lenses). The focal length of a lens is determined by measuring the distance between the rear model of the lens and the focal plane.
- Magnification and also Angle of View is to do with how much of the area around it you can see or the angle around it. This can be made bigger or smaller by zoom, the more you zoom in the smaller the angle gets. for example if you use a 55mm lens then you will have a small angle around in the image but if you use a 35mm lens then you will have a wide-angle around the image.
- We then learnt about lenses and their focal length
- A wide short lens is usually around 28mm to work out the focal length and the digital equivalent is to divide 28 by 2 which is 14 and then add to the original size which would be 42mm.
- A standard normal lens is around 50mm and you do exactly the same as before to work out the focal length, divide by 2 which is 25 and then add to the original which would equal 75mm
- A telephoto long lens is usually 105mm and then you divide by 2 which is 52.5 and then add to the original which is 157.5mm, focal length.
- Long lens have the advantage of being able to get closer to the subjects that are further away, this enables photographers to capture subjects where you can’t get really closet the subject for example if they wanted to capture an image including sports or wildlife and animals.
- Depth of field is how much of the final photograph is focused, you can get good depth of field if you focus the image before you take it, you can do this either by using manual focus or auto focus, which means the camera will focus it for you. Using manual focus is also something a lens can do.
- Short lenses can help a photographer capture a panoramic view of a scene that they are very close to, however this can lead to lens distortion where certain objects appear larger than they should be because the lens bends or stretches it out of perspective. Shorter lenses have the advantage of being able to give photographers considerable depth of field.
We were then given the task of making our own series of images using both a DSLR and a film camera. The film camera enabled us to change our exposure and our aperture and enabled us to put into practice what we have already learnt. The title of our project was called the Good, Bad and the Ugly of Harlow.
We were taken to the town park which gave us the freedom to capture different things and find things that were good, bad and ugly about Harlow. We were able to get pictures of lakes, rivers, ducks, animals, a farm, some tree’s and also a lot of other things commonly found in a park. we could then put these into categories of what was good, bad and ugly.
As it was the first time for most of us using a film camera it was difficult to get used to at first, but we eventually got used to and it became a lot at easier to use by the end.
Here are the negatives that were produced by the film camera that we used in the town park.
These images weren’t the best, but then again it was the first time that we had used a film camera to this extent. I am although very happy with the results and am very happy with what I took and feel that I reached my personal target and also achieved the objective which was to capture the good, bad and the ugly of Harlow.
Even though some of the images are unclear and some are either under or over exposed with this images I took and that i have in my head I feel that the shoot was successful.
To achieve better results next time I use this type of camera I will do the following
- Check my image is in focus so that it is clear
- Check that my image is zoomed properly so that the subject can be seen.
- Check my aperture and my ISO and make sure they are correct, I can make sure this is right by checking the dials and the measurements inside the camera, which you can see when you look through viewfinder.
Checking this constantly before taking each image will give a lot better results and I will be able to fulfill the object a lot more because people will be able to see what I have actually photographed and see which category in the title I have represented in my photo.
Here are the results that I got from my DSLR camera.