Focal Length Photography
Definition
There are two different lenses, prime and zoom. A prime lens stays at a fixed length and produces a higher quality image whereas a zoom lens offers flexibility between different focal lengths.
There are two different lenses, prime and zoom. A prime lens stays at a fixed length and produces a higher quality image whereas a zoom lens offers flexibility between different focal lengths.
A lens with a focal length of 50mm is called 'normal', it does not reduce or magnify the image, it keeps it the way we see it to the naked eye.
Wide angle lenses (short focal length) capture more because they have a wider picture angle. A wide angle is associated with the reduction of objects.
Telephoto lenses (long focal length) have a narrower picture angle, it is associated with larger magnification of distant objects.
Focal Experiment 1
The first focal experiment I done was testing how much of a frame I loose when moving from each lens stop. The lengths on my camera are 18mm, 24mm, 35mm, 45mm and 55mm. To do the experiment I set my camera up on a tripod and ensured that Phoebe's body (my model) was all in the frame. Without moving I took a photo at each focal length zooming in each time and loosing part of the frame with that.
The second focal experiment I done was to test the distortion when using different focal lengths. Again I started with 18mm and worked my way up to 55mm. However this time I moved back at each stop to ensure that only Phoebe's head and shoulders were in each frame. As I done this Phoebe's facial features went from out of proportion at 18mm to seeing her normally at 55mm.
I think this experiment was very interesting seeing how an image changes completely by zooming out but still keeping the same framing. The first image shows a lot of distortion in phoebe's facial features which was illuminated by zooming out to 55mm. The first images where they are distorted could be seen as a comical approach a its very cartoon-like to exaggerate features whereas the last ones are how we see each other with the naked eye. Overall I think this experiment worked well by correctly showing the change between different focal lengths.
18mm
24mm
35mm
45mm
55mm
I think this experiment went well as it accurately shows how going from wide angle to telephoto image changes the amount of background that is visible. I like the closeness of the last image as it isn't over complicated, the background is simple and Phoebe being the main subject is very focused. I think the framing of the last couple of images is really good and I prefer it to the first ones as Phoebe is slightly off centre with red flowers being in the corner bringing a good amount of colour and depth to the image.
Focal Experiment 2
The second focal experiment I done was to test the distortion when using different focal lengths. Again I started with 18mm and worked my way up to 55mm. However this time I moved back at each stop to ensure that only Phoebe's head and shoulders were in each frame. As I done this Phoebe's facial features went from out of proportion at 18mm to seeing her normally at 55mm.
18mm
24mm
35mm
45mm
55mm
I think this experiment was very interesting seeing how an image changes completely by zooming out but still keeping the same framing. The first image shows a lot of distortion in phoebe's facial features which was illuminated by zooming out to 55mm. The first images where they are distorted could be seen as a comical approach a its very cartoon-like to exaggerate features whereas the last ones are how we see each other with the naked eye. Overall I think this experiment worked well by correctly showing the change between different focal lengths.
excellent work here
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