11.02.2015 (Week 3)
Felicia Chong Khei Mink, (0322359)
Introduction to Photography 
Exercise 2b &c : Shutter speed & ISO

Lecture:
Today is the last class before Chinese New Year holiday, Mr. Vinod briefed us about what shutter speed and ISO is. After that, he gave us quiz by using App on the topic of Aperture and ISO. Indeed, there're some questions that I really don't know what's the answers since I haven't learn about ISO. Then, we did practice about Shutter speed & ISO, and assignment is assigned. 

Instruction:
Exercise 2b) Shutter Speed
Directions: Choose a room that has good light and a ceiling fan. Keep the fan speed at 1 and capture images using shutter settings from 1/1000th of a second till 1’ of a second. Ensure the ISO and aperture adjusted according to what your camera light meter indicates as the correct exposure throughout the exposures. Repeat this exercise after changing the fan speed from 1 to 2 and the from 2 to 3 and so on.
All images must be in black and white, you can make the adjustment in the camera (if the feature is available) or make the adjustment later in photoshop (Image > Adjust > Black & White). Upload the screenshot of the document only and not the individual pictures for the shutter speed exercise.

2b) Shutter Speed (5%)

Marking Criteria: The student must capture the evidence of the Shutter’s ability to freeze fast moving objects and blur moving objects.

Exercise 2c: ISO
Upon reading, viewing and discussing the material on ISO, we have come to agree that ISO effects exposure (Exercise 2c.1) and effects the quality of an image (Exercise 2c.2).
Your task today, requires you to prove that:
2c.1) ISO effects exposure
2c.2) ISO effects the quality of an image by increasing the noise and grain of a picture.

All images must be in black and white, you can make the adjustment in the camera (if the feature is available) or make the adjustment later in photoshop (Image > Adjust > Black & White)

2c) ISO (5%)
Marking Criteria: The student must capture the evidence of degradation of image as the ISO increases in sensitivity. The student also must produce evidence that ISO can directly affect exposure.

Exercise 2b : Shutter speed

Exercise 2c.1:  ISO affects exposure 

F 4.0, S 1/3200 , ISO 200

F4.0, S 1/3200, ISO 400

F 4.0, S 1/3200, ISO 800

F 4.0, S 1/3200 ,ISO1600

F4.0, S 1/3200, ISO 3200

F4.0, S 1/3200, ISO 6400

Exercise 2c.2: ISO affects the sensitivity of image sensor

F 18, S 1/4000, ISO 200

F18, S1/2000 ,ISO 400

F 18, S 1/1000, ISO 800

F18, S 1/500, ISO 1600

F 18, S 1/250, ISO 3200

F 18, S 1/125, ISO 6400

Feedback: Felicia, your attempt of exercise 2b: shutter speed, going by the evidence posted on your ePortfolio does not clearly suggest that you have managed to prove that shutter speed does indeed capture (and freeze) fast moving objects. This is due to exposures that weren't accurate. Your pictures were darker in the beginning and then get progressively lighter when doing the exercise, this indicates there was either less light in your room or your exposure settings wasn't correct (you did not follow the exposure meter). This phenomena was not explained in your reflection nor were your findings articulated in-depth. It is important for you to do so in order for me to gauge whether you have understood the exercise or not, so that I may take remedial measures. As such you will need to do this exercise again. Please take a look at Sonia's work, and ask her how she went about it. See me in class once you have redone your work.
In exercise 2c.1 & 2c.2 you have managed to successfully showcase evidence that ISO does effect exposure when ISO dial is increase without it being compensated by either aperture or shutter, and quality of image when ISO is increased and the image progressively degrades due to grain and noise becoming more visible. Good work. --- The ePortfolio reflection was too brief and as such, didn't give much insight into what you have understood from the exercise. I am therefore unable to know whether any corrective measures need to be taken, for me to help you. In future, please explain and articulate your observations and findings properly. Refer to the example of the students ePortfolio that I posted (Rahila's) and see how she writes a reflection.
Reflections:

Experience:
 I personally felt very happy because it's like 'Finally! I know what to do with ISO and how to adjust shutter speed ! ' . Mr.Vinod 's class is not boring, and I understood what he taught ,always.  But, memorizing is kind of challenging for me.
Basically ,ISO adjust the camera's sensitivity to light and it controls exposure as well.
The image sensor is in the camera body and it controls by ISO.
Shutter speed is basically the duration of time the shutter remains open to allow light to reach a digital camera sensor.

Obeservation : 
I noticed that sometimes there's not only one thing a function can do. For example ,ISO , it can affects the exposure in the same time affects the quality of a particular photo. Sound interesting!
Furthermore, I noticed that for a slower film, it is less sensitive and require more light. For a faster film, it react rapidly and can be used in low light situations. 
Besides,I've noticed that with increased of sensitivity,(higher ISO),camera can capture images in low light environments without having to use a flash.So, for brighter environment, lower ISO will do.


Findings: 
After class, I've learnt that the higher sensitivity, the less light is needed to make an exposure. Shooting with lower ISO number require more light than shooting at higher ISO.
I found that slow film produces sharper, more detailed image but fast film often have higher contrast and grain.
I realized that sometimes, photography may sound hard or look hard while Mr. Vinod is teaching, but it's actually not when it comes to exercises. IMPORTANT: No yawning in the class and pay attention in class then everything will be fine.