LAB 3: Lenses

I used 3 lenses for this lab: a Canon 85mm f/1.8, a Canon 50mm f/1.8 and a Canon 35mm f/2.0. I shot with my Canon 80D and used a tripod as well.

1- Still Life

35mm - There's quite a bit of background in this photo, and although it is blurred, it is identifiable almost instantly as a computer screen and keyboard. The lines, especially the keyboard towards the far left of the photo, are slightly distorted, seeming more curved then they really are.

35mm - There's quite a bit of background in this photo, and although it is blurred, it is identifiable almost instantly as a computer screen and keyboard. The lines, especially the keyboard towards the far left of the photo, are slightly distorted, seeming more curved then they really are.

50mm - The background is cut in this photo, showing less of the keyboard and of the computer screen, and the bokeh is also more intense, making it less clear what exactly the background object is.

50mm - The background is cut in this photo, showing less of the keyboard and of the computer screen, and the bokeh is also more intense, making it less clear what exactly the background object is.

85mm - The background is quite tight in this photo, the computer screen is completely cut and the keyboard is heavily blurred. The lines, however, are very straight, with no visible lens distortion.

85mm - The background is quite tight in this photo, the computer screen is completely cut and the keyboard is heavily blurred. The lines, however, are very straight, with no visible lens distortion.

2- People

85mm - Luc's face is pretty flat in this photo, and it really just seems like there are two layers: the foreground and background, with no clear transition between them. I do find that this is the nicest portrait of the 3 however, because of the quality of the background blur.

85mm - Luc's face is pretty flat in this photo, and it really just seems like there are two layers: the foreground and background, with no clear transition between them. I do find that this is the nicest portrait of the 3 however, because of the quality of the background blur.

50mm - Luc's face seems slightly rounder and has more dimension in this photo, and Emily is identifiable compared to the 85mm where she was completely blurred out. The background is blurred, but less than with the 85mm.

50mm - Luc's face seems slightly rounder and has more dimension in this photo, and Emily is identifiable compared to the 85mm where she was completely blurred out. The background is blurred, but less than with the 85mm.

35mm - There is more distortion in this photo, with the bottom of Luc seeming larger than usual and his head looking small. Emily, although slightly blurred, is much more visible than in the first 2 images, and the background is also much clearer.

35mm - There is more distortion in this photo, with the bottom of Luc seeming larger than usual and his head looking small. Emily, although slightly blurred, is much more visible than in the first 2 images, and the background is also much clearer.

FOCAL LENGTH / DOF

85mm - The background is very blurred in this image, as well as an element in front of a subject. Only the subject is sharp.

85mm - The background is very blurred in this image, as well as an element in front of a subject. Only the subject is sharp.

50mm - The background is still blurred, but it is more visible: we can clearly identify the computers and the chairs. There is also more in the frame, since 50mm is a wider focal length than 85mm. 

50mm - The background is still blurred, but it is more visible: we can clearly identify the computers and the chairs. There is also more in the frame, since 50mm is a wider focal length than 85mm. 

35mm - The background here is barely blurred, and is easily identifiable. The objects in front of the subject are also blurred, but still identifiable. There is a lot more in frame here, since it was shot with a wide focal length, and the subject doesn't take up a lot of space in the photo.

35mm - The background here is barely blurred, and is easily identifiable. The objects in front of the subject are also blurred, but still identifiable. There is a lot more in frame here, since it was shot with a wide focal length, and the subject doesn't take up a lot of space in the photo.

LENS TEST

2.jpg
In these 3 images, shot respectively at 35mm, 50mm and 85mm, all at f/2.0, have reasonably sharp centres but start to lose sharpness around the corners.

In these 3 images, shot respectively at 35mm, 50mm and 85mm, all at f/2.0, have reasonably sharp centres but start to lose sharpness around the corners.

These 3 images, shot at 35mm, 50mm and 85mm respectively, at f/22, are all slightly soft throughout the whole of the images. 

These 3 images, shot at 35mm, 50mm and 85mm respectively, at f/22, are all slightly soft throughout the whole of the images. 

These two images, shot at 50mm and 35mm at f/11, are very sharp. Using an aperture in the middle of the lens' range produces sharper images.

These two images, shot at 50mm and 35mm at f/11, are very sharp. Using an aperture in the middle of the lens' range produces sharper images.