Exercise: Higher and Lower Sensitivity

For this exercise, i had to find a scene with a mixture of light levels and subject movement or depth of field is only just possible such an a street market on an overcast day. I had to take a series of picture with a low ISO, about ISO 100 - 200 and then another series with a higher ISO, such as ISO 800 and note the difference.

Low sensitivity

Set to ISO 100, the colours are quite dark here, there are a lot of blacks, but not a lot of shadow. 

The image of some curtains hanging is very sharp, you can see each crease . Still no real shadows in the image.

The people here are quite dark, undercover compared to the light that is behind them. Perhaps at a higher sensitivity their faces would be more visible and not as consumed by darkness that seems to fall into every shadow or crease.

The white cover over head here looks quite grey, the people underneath are quite dark in comparison. The lines in the ceiling give a good sense of length, the smaller, people underneath in the dark add to this

Shoppers in a more open scene. Again, still a lot of blacks.

The light shining through the green fabric gives the people underneath a slight green tinge .

Higher sensitivity

There doesn't seem to be much shade or black in the creases and folds of the fabrics as opposed to the fabric in the lower sensitivity photograph.

The colours here are nice and strong, there doesn't seem to be as much black present as in the lower sensitivity photographs.

Images don't seem quite as crisp. If you blow this image up, it seems quite grainy unlike the lower sensitivity photographs.

Whites seem a lot brighter. The cover overhead is a lot whiter and brighter tun in the lower sensitivity photos.

The higher sensitivity photographs were a lot grainier than the lower sensitivity. This was not always noticeable until you zoomed into the picture. In a photograph with a lot of detail, this may be a slight hinderance, as some of the sharpness and detail is lost in the graininess. The lower sensitivity photographs look a lot better for high detailed photographs where there is a lot going on. However the less detailed photographs, there really isn't much difference quality wise i found. In fact some of the higher sensitivity photographs looked better as they were lighter and didn't seem to contain as much black, meaning you could see a lot more of the photograph better. Even though it didn't look perhaps as sharp or detailed, but that didn't really matter. On its own it would look perfectly fine. It is only by comparison that disadvantages can be pulled out of each photograph.