Lesson 4 Three Lights

Three Light Inspiration

Three Light Breakdown

Production Stills Yael Eban

Assignment 4 Three Lights

Assignment 4 Three Lights
Using classic Rembrandt lights (45 to side 45 up) create a portrait with key (150 watt bulb), fill (75 watt bulb) and backlight (special spotlight bulb or 75 watt bulb).. Check blog under Lesson 4 to see how it should be laid out.

Using three lights invent your own formula.
Post one separate finished photograph for this one

Lesson 3 Refraction, Diffusion, Direction of Light and Using One Light

More on Rosco's Website



Five things that happen when light falls on a form.

 

 

Paying attention to the direction of the light.

 

Ball Cube and Cylinder

The Fresnel Lens
 

 

Light on a Stick Portraits

 

Production Stills by Benz Siripatrachai

Assignment 3 One Light

Using the 250 watt halogen bulb in the equipment closet, make a portrait by selecting a quality and direction of light to communicate an emotion that you feel about a person.  Make an additional portrait that reflects the opposite feeling you have about the person.  Explain in writing the laws of light that were at work in each portrait.

Assignment 2: Light Travels in a Straight Line, the Angle of Incident Equals the Reflection and the Inverse Square Law

In one photograph using one light source clearly demonstrate the 3 laws of light at work.  Include the light source in the photograph.  The subject is the light.    Think of it as more of a physics project than a photograph.  Use a dodging tool to prevent the light from flaring the lens.  Not a picture of a light stands,  clamps, a framed mirror etc.

Lesson 2 Angle of Reflection and Straight Line

Using pool as an example of angle of incidence = angle of reflection.

An illustration of how a rough or matt surface effects the angle of reflection.

Examples of different surfaces reflecting a beam of light.



 

Our experiment with two sizes of light sources and a 6" hole
 

 

How a parabolic reflector works.

Light travels in a straight line we used a camera obscura to illustrate the law.

The larger the whole the less sharp the image is.

Demonstration of Light traveling in a straight line.

Production Stills by Roy Rochlin

Lesson 1 Inverse Square Law

The inverse square law states that the intensity of the light from a point source diminishes inversely to the square of the distance. I=1/d² Here is a better illustration that what I drew on the white board.

 

 

 

I got this next chart from Lee Varis's website. He illustrates here the relationship of 18% grey to a modified 10 step zone system, 50% that you would see in Lightroom's histogram and the number 118 you see in Photoshop's histogram using RGB color space. 

 

Here is the results of our test in class with the middle grey card adjusted in Lightroom and tweaked in photoshop to look the same. You can see the Front card gets darker in relation to the Middle card as the light is moved further away and the Back card gets lighter as the light is moved further away.  The 32 foot distance looks light some other light was contaminating the results.

 

Here is a chart of mathematical calculations we made alone with the meter reading that actually was more accurate. I have had this experiment work in the past but not on our day. The PM's class was behaving similarly to ours. I don't have an explanation as of yet.

Production Stills by Ann Beeke

Assignment 1 The Inverse Square Law

Part 1
Using 3 identical 4x5 grey cards set 1 foot apart and overlapping 1" make 4 photographs of the cards with the light 2 feet, 4 feet, 8 feet and 16 feet from the middle card.  Use an incident meter on the middle card to give the correct exposure.  The middle card should have the same value on each photograph.

Part 2 

Use 3 4x5 cards a black card in front, a grey card in the middle and a white card in the back. Using a single point source make all 3 cards appear to be the same value.

 

Also by next week:

Make a Blog

• Make an account with google.com
• Go to Blogger.com and sign in
• Create an blog with your id photo.
• Email your name and  your blogs url  to ccs@nyc.rr.com and I will setup a link to the class blog
• Post your work each week with 8 meg files

Class Syllabus

Who should take this class: 

Anyone interested in learning lighting.  No prior knowledge of lighting is required.

 

Class Description:

This course is an opportunity to learn the laws of light and to gain an appreciation of how important an understanding of light is to a photographer’s process. The class will begin with an exploration of the physics of light in order to explain its behavior. The weekly sessions and assignments will teach the student how to approach every lighting experience with confidence.  The purpose is to master these concepts and to ensure effective application of this knowledge. The ability to problem solve is a crucial element when faced with challenging lighting situations and without this understanding it is very difficult to move beyond obvious limitations. The ultimate goal is to be able to apply these concepts and then to see all the possibilities.

Assignments:

Each week there will be a demonstration and a class exercise that will end with a weekly assignment. There will be a total of thirteen weekly assignments and one final project.

Each student will post their weekly assignments on their lighting blog along with a sketch and brief explanation of their results.

 Grading:

A commitment from the students is expected. Being on time, prepared with homework and ready to learn are requirements.  The student’s aesthetic approach to lighting will also be a factor in grading.

 

Schedule:

Lesson  1:   Inverse Square Law

Lesson  2:   Angle of Incident, Light Travels in a Straight Line

Lesson  3:   One Light Source

Lesson  4:   Three Light Source

Lesson  5:   One Strobe

Lesson  6:   Size Matters

Lesson  7:   Strobe and Continuous Light

Lesson  8:   Hand Flash

Lesson  9:   Outdoor Flash

Lesson 10:  Light Painting

Lesson 11:  Shiny Metal and Glass

Lesson 12:  Night Photography

Lesson 13:  Stop Action

Lesson 14:  Bring in a lighting problem to solve

Lesson 15:  Review final assignment