Exercise - Higher and lower sensitivity

I took 12 different photos, 6 with higher ISO of 800/1600 and another 6 with lowest ISO of 100.
The purpose of this exercise is to see how easy the photography was and assess of the image quality.

Higher ISO
I took 6 different photos in low light situation.
1. this one was taken in a cript under Winchester Cathedral. By setting ISO of 1600 (the highest ISO available in my camera) I could manage to get this shot without using tripod.



2. I was trying to capture image of fish in a pond. With ISO of 800 I managed to get shutter speed to 1/60 sec and therefore just about to freeze the movement of the fish.



3. This image was taken in a pub and with low light. the high ISO of 800 able me to get this shot without too much blur.



4. Taking an image in this Cathedral with ISO of 800 helps increasing shutter speed enough to freeze the moment of the choir



5. This image was taken just after the Sun had set. By using ISO of 1600 I could just about to manage to take this image without tripod.



6. This image was taken under a slightly overcast day. I set an ISO to 800. The only movement in the image was I trying to hold a camera very still.



Summary: Most of the images using higher ISO (800/1600) has made it more possible of taking photos at lower light level and with movement of subjects.

Lower ISO (sensitivity) All images below were taken with ISO setting at 100. The purpose was to see how easy capturing images with low ISO .

1. I had to admit that I took the image below using tripod. With ISO100 the shutter speed was too slow (1/6sec) for me to able to hold the camera still.



2. This image was similar to the image using higher ISO. With ISO 100 the image was really blur.



3. This image was taken in a pub at the same time as taken with high ISO.
The lower ISO of 100 has made the image very blur with somewhat artistic! (captured all the hand movement)



4. This image was taken in a low light gallery. Setting ISO 100 has made it more difficult to prevent image blur.


5. This image was also taken using tripod to be able to get the flow of the river.



6. This image was taken on a tripod. Without it the image would be quite blur because of the low light level.



Summary: The lower ISO of 100 has made it more difficult or near enough impossible to take photos in low light level without any image blur because of the lower shutter speed. Using tripod has helped making it possible in reducing any camera shake.

Conclusion:
The images taken with much higher ISO (800/1600) contain speckled texture or grain while the images with lower ISO (100) have much visible grain.
The higher the ISO setter, the higher shutter speed the camera can achieve with the same f stop which consequently less blur / shaky images produced.
The preferred images are the ones with lower grain. However with lower grain images, it means to use lower ISO setting and consequently slower shutter speed which possibility of causing camera shake during photography.
Without the help of tripod to reduce camera shake with the slow shutter speed, higher grain would be the preferred choice.

Using advanced image manipulation, the grain can be reduced, but the blurry photo can not be corrected!!