Digital Photography and Imaging / Week 5

October 23, 2023

Digital Photography and Imaging / Week 5

24.10.2023 - 30.10.2023 / Week 5

Bong Sue Zhiun (0366866)

Digital Photography and Imaging

Digital Imaging Exercise

1. Lecture

2. Instruction

3. Tutorial

4. Practical

LECTURE

Week 5 : Digital Photography

Exposure Setting

In photography, exposure is the amount of light which reaches your camera sensor or film.

Fig.1.1. Exposure Setting, Week 5 , 24.10.2023

The main parts of the camera:

Camera body :

Shutter
Image sensor
LCD Screen

Camera Lens :

Aperture / Iris

Fig.1.2. Main parts of the camera, Week 5 , 24.10.2023

1.Iris / Aperture is measured by f-stop, indicated by sequence of f-number :

The lower the f-number, the larger the lens opening.

Fig.1.3. Sequence of f- number, Week 5 , 24.10.2023

2. Shutter is a small plastic sheet that opens and closes to allow light onto the film or prevent light from reaching the film.

Fig.1.4. Shutter , Week 5 , 24.10.2023

Shutter speed is measured in seconds: 1/1000 s,1/500 s,1/250 s,1/125 s,1/60 s,1/30 s,1/15 s,1/8 s,1/4 s,1/2 s,1 s, 2 s, 3 s…

Fig.1.21. Shutter speed , Week 5 , 24.10.2023

Fig.1.5. Shutter speed, Week 5 , 24.10.2023

3. ISO: Originally referred to the sensitivity of film—it's "light gathering" ability. For digital photography, ISO refers to the sensitivity—the signal gain—of the camera's sensor.

Fig.1.6. ISO, Week 5 , 24.10.2023

The common ISO camera settings are: 100, 200, 400, 640, 800, 1600, 3200, 6400….

Fig.1.7. Common ISO camera settings, Week 5 , 24.10.2023

The lower the number of ISO the less sensitive your camera is to light and the finer the grain.

Fig.1.8.Common ISO camera settings, Week 5 , 24.10.2023

Lens Perspective

The are wide angle lens, standard lens and tele lens.

Fig.1.9. Type of Lens ,Week 5 , 24.10.2023

Appropriate lens provided desire framing, lens choice affects angle of view.

Fig.1.10.Different lens in different angle of view, Week 5 , 24.10.2023

Different lenses are designed for different for different purposes. Lenses can be categorized by focal length.

Fig.1.11.Types of Camera Lenses, Week 5 , 24.10.2023

1. Focal Length: Focal length is the measurement (in millimeters) from the optical centre of a camera lens to the camera’s sensor. The shorter the focal length, the wider the angle of view and vice-versa.

Fig.1.12. Focal Length, Week 5 , 24.10.2023

2. Depth Of Field: The proportion of the image that is reasonably sharp and in focus.

The smaller the aperture you use, the greater the depth of field.

Fig.1.13. Depth of Field , Week 5 , 24.10.2023

3. Wide angle lens : It is especially useful for landscape photography or street photography. With wide angle lenses, almost everything is in focus, unless your subject is very close to the lens.

Fig.1.14. Using Wide angle lens , Week 5 , 24.10.2023

4. Standard lens: It offers a fairly accurate representation of what the human eye sees, both in terms of visual angle and perspective. Images created by standard lens are perceived as more natural than those taken with other types of camera lenses.

Fig.1.15. Using Standard lens , Week 5 , 24.10.2023

5. Tele lens: It is great for isolating a subject that is far away. It allows photograph subjects from a distance thanks to their magnification.

Fig.1.16. Using Tele Lens , Week 5 , 24.10.2023

DSLR V. S Smartphone

Smartphones vs Cameras = Convenience vs Quality

1. DSLR cameras are designed to capture image. Entry-level DSLR have much larger lenses and sensors than mobile phones do.

2. Phones are designed to carry out a multitude of functions. Phone cameras are very limited by size. The size of the lens and the size of the sensor that captures the photos.

Reference:

1. Learn Photography : https://photographylife.com/learn-photography

2. What is Shutter Speed ? : https://youtu.be/FdJhkRFFvUs

3. Smartphone vs pro DSLR : https://youtu.be/lUPGljku_kE

INSTRUCTIONS

TUTORIAL

Week 5

Digital Imaging Exercise

Tutorial : Video Shooting https://youtu.be/JiVVWiqTnQc

Tutorial slides ( Shazam exercise ) : https://bit.ly/3CsxWyK

Tutorial for the Shazam exercise : https://youtu.be/b6XqlUP-MUA

PRACTICAL

Digital Imaging Exercise

Part 1 : Hearst Mansion

In this exercise, we are going to crop out the Shazam and let him lean against the wall in the hearst mansion. Thus, we will learn how to use Quick Selection Tool , Layer Mask, Filters & Colour Correction.

Fig.2.1 & 2. ( Left ) Shazam , ( Right ) Hearst Mansion , Week 5, 24.10.2023

Below are my outcome by following the step-by-step tutorial video:

Fig.2.3. My outcome for the Shazam exercise , Week 5, 24.10.2023

Part 2 : My Reflection

We have to create the same steps and insert our own photo to replace the Shazam's layer based on the Shazam exercise.

1. Take a photo of myself.

Fig.2.4. Photo of myself , Week 5, 24.10.2023

2. Use Quick Selection tool to subtract background.

Fig.2.5. Process work , Week 5, 24.10.2023

3. Copy & Paste the photo of myself to Hearst Mansion, resize me and reposition.

Fig.2.6. Process work , Week 5, 24.10.2023

4. Adjust colour correction ( Image > Adjustments > Match colour ).

Fig.2.7. Process work , Week 5, 24.10.2023

5. Create new layer and create shadow using Brush Tool.

Fig.2.8. Process work , Week 5, 24.10.2023

6. Reduce the shadow's layer to 66% opacity & apply Gaussian Blur effect on the shadow layer ( Filter > Blur > Gaussian Blur ).

Fig.2.9. Process work , Week 5, 24.10.2023

Fig.2.10. Process work , Week 5, 24.10.2023

7. Create new layer to make my reflection. Duplicate the me's layer and rename the layer as reflection.

Fig.2.11. Process work , Week 5, 24.10.2023

8. Use pen tool to draw the part that I want and apply layer mask.

Fig.2.12. Process work , Week 5, 24.10.2023

Fig.2.13. Process Work ( Apply Layer Mask) , Week 5, 24.10.2023

9. Adjust the colour correct for the reflection layer. ( Image > Adjustments > Hue/Saturation & Brightness/Contrast ) Apply Gaussian Blur effect on the reflection layer.