Lab 3: Lenses

Part 1: Lens Focal Length

1. Still Life

I used my 18-135mm Lens to this part. I played with the 18-55-135mm focal length. 

ISO 800 F5.6 1/25s
18-135mm (18mm)










ISO 800 F5.6 1/25s
18-135mm (59mm)











ISO 800 F5.6 1/15s
18-135mm (135mm)

My aperture for this project was at F8 and I can remark that the background become more blurry the more the focal length increases. I think there is more distortion in the first picture than the last one. The lens is the last picture seems to be the sharpest.

2. People

ISO 400 F8.0 1/8s

18-135mm (18mm)

ISO 400 F8.0 1/8s

18-135mm (69mm)

ISO 400 F8.0 1/5s

18-135mm (135mm)

The first picture isn't very sharp compared to the last two. Maxime seems kind of blurry in the second picture compared to Andriana who's very sharp. In the last picture, Andriana in the foreground is sharp and Maxime in the middle ground seems more sharper than in the 2nd picture.

Part 2: Focal Length and Depth of Field

ISO 400 F8.0 0.4s
18-135mm (18mm)

ISO 400 F8.0 0.4s
18-135mm (56mm)











ISO 400 F8.0 0.4s
18-135mm (135mm)

The sharpest picture is the last one because we really can see the background but the foreground is a little bit blurry. The first picture is more of a global shot so the foreground (column) and the middle ground are seems sharp but we can't really see details in the background. In the second picture, the column is what I think is the more in focus and the background is still very blurry because the end of the hallway is far away.

Part 3: Test your Lens

ISO 100 F2.0 1/2000s
50mm

ISO 100 F4.0 1/500s
18-135mm (18mm)

ISO 100 F5.6 1/200s
18-135mm (135mm)

ISO 100 F8.0 1/125s
50mm

ISO 100 F11 1/60s
18-135mm (18mm)

ISO 100 F16 1/25s
18-135mm (135mm)

ISO 100 F22 1/15s
50mm

ISO 100 F32 1/6s
18-135mm (135mm)











I remark that the Focal Length of 18mm at wide aperture has a lot of distortion compared to the 50mm and 135mm with the same Aperture. The more the aperture became small, the less distortion is the picture we see. I think the distortion depends of the aperture and the focal length of the lens used. We can see in some pictures that the edges are softer than in other pictures.