Pinhole Photography

what are the only things you NEED in a pinhole camera?

(light-tight)!

bodyaperture!(hole)

shutter

(and something light-sensitive if you want to make a permanent image)

how does it work? photo!paper

sun

I want to take a photograph !of this awesome thing

your pinhole camera doesn’t have “settings”...but what can you control?

aperture size focal length!(aperture to paper)

exposure time!(how long is the shutter open?)

FOCAL LENGTH - affects how zoomed in the image is

How did the size of the hole in our room window affect the image?!Moving the focal plane (tracing paper or photo paper) changes the size and focus of the image.

How did the size of the hole in our room window affect the image?!Moving the focal plane (tracing paper or photo paper) changes the size and focus of the image.

ALSO - you can control how far away your camera is from what you are photographing

Aperture Diameter = 1.9 Focal Length X wavelength of light

Wavelength (usually the wavelength for yellow/green light 0.00055 mm is used)

Aperture Diameter = 1.9 101.6mm (4”) X 0.00055mm

0.446mm = 1.9 101.6mm (4”) X 0.00055mm

0.017” = Aperture/Pinhole

Calculate your Aperture

13

The f-number of the camera may be calculated by dividing the distance from the pinhole to the imaging plane (the focal length) by the diameter of the pinhole. For example, a camera with a 0.02 inch (0.5 mm) diameter pinhole, and a 2 inch (50 mm) focal length would have an f-number of 2/0.02 (50/0.5), or 100 (f/100 in conventional notation).

Aperture DiameterFocal Length

ƒ-number =

0.017” (0.45mm)4 inchƒ-number =

ƒ/235 =

Calculate your ƒ-number

Aperture & Focal Length

3” = .015

Pinhole Photography

NAME Cecil DIAGRAM

FOCAL LENGTH 6 inches

APERTURE DIAMETER 0.01 9”

EXPOSURE TIME DISTANCE TO SUBJECT

WEATHER SUBJECT MATTER RESULTS

1 2 min 6’ sunny me too dark

2 1 min 4’ sunny me too dark, LIGHT LEAK

3 1 min 4’ sunny me dark, LEAK

4 1 min 4’ sunny me Yay! too light

5 1:30 min 6’ sunny class Yay! Success

6 2 min 50’ cloudy, foggy school success, foreground a little light

7 5 min 1’ cloudy, foggy fence A little light

bottom side and lid

6”

shutter

aperture

14”

9.5”

sink

water fixer stop bath developerwhat do I do? develops the paper!

(oxidizes silver)!(pH 11 or 12 = base)

stops the!developing!(low pH = acid, !neutralizes the!

developer)

stabilizes!the image!

(removes unexposed !silver from the paper)

cleans the print!(washes off all !the chemicals)

how long?

I should be replaced when...

1 1/2 minutes!(90 sec)30 sec5 minutes5 minutes

N/A if I get cloudy when!you drip hypo check in

if I am a dark!purple color if I am a brown color

YES

Keep tongs organized & drip off prints

Check to see if chemistry is exhausted . . .

DEVELOPER turns brown

Hypo Chek turns cloudy when dripped into FIXER

STOP BATH turns purple

If so, developer and stop go down the drain, fixer goes in the bucket

Contrast white, black, & gray values

Focus steady the camera

Subject Matter something close and far away

A Good Pinhole Negative

Pinhole Photography Name: ! !

OBJECTIVE: Complete a pinhole photograph considering the composition, light source, focal distance, exposure, and subject matter. Issues related to pinhole photography concerning contrast, camera steadiness, subject size and distortion should be considered.

Tape them together as shown ➚#Photographs.What was the most rewarding part of taking photos and making positives with your camera and the darkroom/digital lab?

What was the most challenging part?#

How did you overcome this difficulty?

What would you do differently or do more of with pinhole photography?

Camera:.What surprised you most about the construction and use of your camera?

How well did your camera perform in taking photos?

Did you have to solve any problems related to your camera, if so, what were they and how did you solve the problem?

NEGATIVE POSITIVE

time aperture setting

distance time

weather

Presentation:Prints are cut or cropped neatly. Photos are taped together.

Design:Photos show consideration of subject matter, light source, proximity of camera to your subjects, and composition.

Studio Skills: Photograph is developed, and printed properly, using correct darkroom procedures.

Objective:Completed a pinhole photograph, labeling exposure, light conditions, and subject distance as well as positive exposure times. Issues related to pinhole photography concerning contrast, camera steadiness, and subject size and distortion are understood.

Total:

Self-Assessment

/25 /25 /25 /25

/100

Teacher Assessment

/25 /25 /25 /25

/100

Aperture, Focal Length, and Exposure Time

Starting Time for sunny

""

2 minutes!2 minutes!

1 ½ minutes!1 ½ minutes!

1 minute!1 minute!

30 seconds

adjust exposure time by double or half

Problem: Experiment with different exposure times informed by the amount of light and the focal distance of your camera to create a successful pinhole negative.

Document everything!In your sketchbook, tape in every single

pinhole exposure you make, and write

down the exposure time (seconds), the

quality of the light, and a description of

what you can do to improve your

exposure the next time.

(40 points total) The Pinhole Camera! (10 points) Function 1) Your pinhole camera is light-tight, all visible light leaks have been sealed. 2) Your camera has a working aperture, shutter, and paper loading mechanism (flat wall to place photographic paper upon). It has been carefully painted black inside of the body.

(40 points) The Pinhole Camera! (10 points) Design1) Your camera can close to seal the interior space from light without requiring lots of tape. 2) The material or object you are making your camera from has been clearly considered to enable the camera to function easily.

(40 points) The Pinhole Camera! (20 points) Craft1) You have demonstrated careful and efficient use of scissors, knives, tape (black and masking tape), spray paint, and other building materials to make your pinhole camera. 2) Your pinhole camera has been built to be strong, durable, and sturdy. You have addressed any structural weaknesses as best as possible. 3) Your camera demonstrates care and craft in its construction. You have invested time in the camera’s overall

appearance.