Photography Theory & Practice Exhaustive Study Guide

Photography as an Art and Science

• Definition of Photography: Photography is defined as the skill, application, and exercise of creating and clicking durable images by recording light through a camera.
• Broad Applications: It is a skill applied across various fields including science, business, fine arts, video and film production, hobbies, recreation, mass awareness, and education. It encompasses media, advertisement, creative activity, and entrepreneurial endeavors.
• Interplay of Art and Science: These two are not mutually exclusive but act intrinsically and instrumentally by complementing each other to produce artistic mastery and scientific discovery.
• Definition of Science (Verbatim): "The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment."
• Definition of Art (Verbatim): "The expression or application of human creative skill and imagination, typically in a visual form such as painting or sculpture, producing works to be appreciated primarily for their beauty or emotional power."
• Painting analogy: Like painting involving scientific drawing mechanisms and pigment blending, a photo involves creative instincts joined with scientific principles of physics and chemistry.
• The Role of Emotion: Every photograph provides an emotional stimulus to the viewer and tells a story or reveals beauty. Even dark or grotesque images can elicit an emotional response through artistic quality.
• Photography as an Extension of Painting: While painting takes hours or years, photography captures emotions in a click. Both allow the artist to manipulate reality (e.g., making a house look bigger) via techniques and editing.
• "Art for Art’s Sake": Applying Neitzsche’s philosophy, artistic photographs do not necessarily need commercial value or a logical explanation; aesthetics often exist beyond scientific reasoning.

The Science of Light and the Camera

• Photons: Light is composed of atomic packets of energy called "photons."
• Wavelength and Energy: Photons have wavelengths dependent on energy levels, which the human eye perceives as color:
  • Higher energy photons = shorter wavelengths ($\text{blue/bluish}$).
  • Lower energy photons = longer wavelengths ($\text{red/reddish}$).
• Light Integration: When all lights are integrated, white light is produced; when there is no light, black darkness occurs.
• The Human Eye vs. Camera (Functional Comparison):
  • Aperture: Comparable to the iris or pupil located at the retina.
  • Lens: The camera lens functions similarly to the eye’s lens.
  • Sensor: Components in the eye sense color and intensity like a camera sensor.
  • Filters: Red, Green, and Blue ($RGB$) filters are present in both the retina and the camera sensor.
• Operational Comparison Table:

• ISO and Film Speed: ISO signifies the sensitivity of an imaging sensor to light.
  • Standard ISO numbers: $100$, $200$, $400$, $800$, and so on.
  • Highest ISO = Higher sensitivity and faster "film speed."
  • Lowest ISO = Lower sensitivity and slower speed.

Colour Theory and Models

• Direct vs. Reflected Light:
  • Direct Light: Seeing color through a monitor screen.
  • Reflected Light: Seeing colors of the tangible world (flowers, printed pages) where light bounces off a surface.
• Instability of Color: Perception changes immediately when light or the medium changes (e.g., a carpet looks different under a screen vs. underfoot).
• George Eastman Quote (Verbatim): "Light makes photography. Embrace light. Admire it. Love it. But above all, know light. Know it for all you are worth, and you will know the key to photography."
• White Balance: The mechanism used to adjust color so that whites/colors indexed by the eye appear correct under various light sources (daylight, tungsten, fluorescent).
• RAW vs. JPG: RAW format allows later correction via software; $.jpg$ files tend to lock the white balance during capture.
• RGB Model (Additive):
  • Colors: Red, Green, Blue.
  • Integration of all three at full intensity = Pure White ($255, 255, 255$).
  • No light = Black ($0, 0, 0$).
  • Pure Yellow = ($255, 255, 0$).
  • Deep Purple shade = ($113, 58, 210$).
  • Allows for over $16\,\text{million}$ color definitions.
• CMYK Model (Subtractive):
  • Colors: Cyan, Magenta, Yellow, and Key (Black).
  • Used in printers. Unsaturated/dark colors are created by adding black ink to save costs and produce deeper tones.
  • Example: Pure Red is $RGB(255, 0, 0)$ but in $CMYK$ printing it is approximately $(0, 100, 100, 0)$.
  • Offset printing uses $CMYK$, but digital printing often still uses $RGB$.

Properties and Qualities of Light

• Intensity (Quantity): Refers to the brightness, strength, or amount of light at a given area.
  • Controlled via the "Exposure Triangle": Aperture, Shutter Speed, and ISO.
  • Intense light strategy: Low ISO, high shutter speed, or small aperture (large $f$-number).
• Quality: Perceived visually as "soft" or "hard."
  • Soft Light: Diffused source, no specific direction, smooth transitions, less concrete shadows. Light sources bigger than the subject cast soft shadows.
  • Hard Light: Smaller sources relative to the subject cast harsh shadows, bright highlights, and high intensity range variations.
• Temperature: Measured on the Kelvin ($K$) scale.
  • Warm/Red end: $\approx 1000\,K$.
  • Cool/Blue end: $\approx 10,000\,K$.
  • Daylight/Electronic Flash: $5000\,K\,\text{to}\,5500\,K$.
  • Tungsten/Incandescent bulbs: $2500\,K\,\text{to}\,2800\,K$.
• Direction: Dictates the shape of the subject and the length of shadows, creating a sense of depth.

Painting and Photography: Comparative Analysis

• Creative Differences:
  • Photography: Captured scene developed from light in a dark environment.
  • Painting: Often an additive process creating something from nothing, remaining visible throughout and developing gradually.
• Subtractive vs. Additive:
  • Photography is generally subtractive (simplifying what exists to its essence).
  • Painting is additive (building from blankness).
• "Multimediating Picture": Coined in $2009$ by Van Gelder and Westgeest. Refers to artists like Jeff Wall who work "photographically like a painter."
• Historical Connections:
  • Paul Gauguin: His painting "Mother and Daughter" was based on a photograph by Henry Lemasson.
  • Bob Dylan: His "Brazil Series" and "Asia Series" at the Gagosian Gallery used images licensed from Magnum Photo Agency as bases for paintings.
• Artist Philosophies:
  • Henry Rankin Poore: Both are physically and mentally demanding, requiring production toil and set arrangement.
  • Some critics once resisted photography as art because it was a "mechanical product" lacking the intended message or free imagination of painting, though this is heavily debated.

Mobile and Drone Photography

• Mobile Photography: Photography using smartphones.
  • Philosophical premise: "The best camera is the one that's always with you."
  • Characteristics: Highly mobile (no studio), fast editing, instant social sharing, use of specialist apps (e.g., Instagram).
  • Accessories:
    1. Lenses: Add-on clip-on lenses for fisheye ($180^{\circ}$), macro ($\text{up to}\,21\times\,\text{magnification}$), and telephoto ($2\times\,\text{to}\,12\times$) effects.
    2. Lights: Portable LED boxes with up to $8\,\text{LEDs}$ to reduce noise and grain.
    3. Tripods: Tabletop, GorillaPod, and multifunction grip sticks (e.g., iKlip Grip Pro).
    4. Storage: MicroSD cards (e.g., SanDisk Ultra), wireless hard drives, and travel routers for backup.
    5. Smart Lenses: Self-contained WiFi cameras that attach to the phone.
• Drone Photography (UAV/UAS):
  • Capable of FPV (First-Person View) in harsh or inaccessible environments.
  • Costs: $< \$100\,\text{to several thousand dollars}$. High-end iXU $180$ ($80\,\text{MP}$) costs $\$60,000$.
  • Regulations (USA/FAA): Restriction on flights above $400\,\text{ft}$ or within $2\,\text{miles}$ of an airport. Commercial use requires a certificate of authorization.
  • Drone Accessories: Sunshades for controllers, landing gear extensions (for tall grass), $ND/CP$ filter kits (to introduce motion blur), Lipo battery bags (fireproof), and GPS trackers.

Digital Camera Basics and Types

• Key Components:
  • Lens: Focuses light; can be fixed or interchangeable.
  • Viewfinder/LCD: Primary visual source for image-taking.
  • Shutter Release: Mechanism that allows the image to be captured.
  • Sensor: CMOS and CCD are the two main types that transform optical images into electronic signals.
  • Aperture: Controls light entry, expressed in $f$-stops (e.g., $f/2.8$).
• Camera Categories:
  • Compact: Simple point-and-shoot, standard or zoom compacts.
  • DSLR (Digital Single-Lens Reflex): Uses a mirror and prism system; allows full frame ($35\,\text{mm}$) or $APS-C$ (crop) sensors.
  • Mirrorless: No mirror, light goes directly to the sensor; quieter and more compact.
  • Action: Small, weather-resistant (e.g., GoPros).
  • 360 Cameras: Uses back-to-back lenses for VR/360 coverage.
  • Medium Format: Uses $120\,\text{film}$ size or matching digital sensor; extremely high resolution ($\text{e.g., Hasselblad H6D-400c at}\,\$50,000$).

Principles of Composition

• Rule of Thirds: Dividing the image into $9$ equal segments with $2$ vertical and $2$ horizontal lines; focal points should sit at intersections.
• Leading Lines: Path for the viewer to follow (vertical lines = power, horizontal = calm, diagonal = movement).
• Negative Space: The empty area around a subject that helps it breathe.
• Symmetry and Patterns: Achievements of balance or rhythmic repetition.
• Foreground Accentuation: Adds depth by including objects in the foreground.
• Vanishing Point: Point where parallel lines appear to converge, simulating $3D$.
• Rule of Odds: Viewers are drawn to odd numbers (e.g., $3$ subjects) with the center subject often prioritized.

Advanced Exposure and Post-Production

• Exposure Triangle:
  • Aperture: Dictates focus effects/depth of field ($DOF$).
  • Shutter Speed: Controls motion effects ($1/30\,\text{s} = \text{streaks}$; $1/1000\,\text{s} = \text{frozen}$).
  • ISO: Light sensitivity ($100\,\text{to}\,1600+$). High ISO = more noise/grain.
• Metering Modes:
  1. Evaluative/Matrix: Averages the whole frame in zones.
  2. Center-Weighted: Averages frame but gives weight to the center ($70\%$\/$30\%$).
  3. Spot Metering: Reads only a small circle/AF point for accuracy in backlit shots.
• Histogram Analysis: A graphical display of light distribution.
  • Spike on the right = Overexposure.
  • Spike on the left = Underexposure/loss of detail in shadows.
• Focusing Mechanisms:
  • Contrast Detection: Monitors sensor contrast; creates perfect focus by "overshooting" then returning. Slow but ubiquitous in phones.
  • Phase Detection: Uses a separate sensor chip; faster as it calculates distance directly (used in DSLRs).
• Photoshop Techniques:
  • Dodge and Burn: Lightening (Dodge) and darkening (Burn) selected areas.
  • Stamp Visible: Merging all layers into a new copy ($Ctrl+Alt+Shift+E$).
  • Ghost Mannequin: Combining multiple shots to make a garment look worn by an invisible person.

Output and Printing Processes

• Digital Formats:
  • TIFF: Lossless, uncompressed, archival standard. Supports $8, 16, 24\text{-bit}$ depth.
  • JPEG: Lossy compression, small file size, standard for web.
  • RAW: Highest quality, requires processing software like Lightroom.
  • DNG (Digital Negative): Adobe’s attempt to standardize proprietary RAW formats.
  • PNG: Lossless web format, supports transparency.
• Historical Printing Methods:
  1. Photogravure: Etched copper plates.
  2. Daguerreotype ($1839-1860$): Images on metal plates (silver over copper) developed with mercury gas.
  3. Platinum Prints: More durable than silver, exceptional tonal range.
  4. Gelatine Silver: The standard for Black and White throughout the $20\text{th}$ century.
  5. C-Prints (Chromogenic): Processed in a darkroom using negative/slides on light-sensitive paper.
• Analog to Digital Conversion (ADC): A chip classifying pixel voltages into binary numbers ($0s$ and $1s$). Consumer cameras use $8\text{-bit ADC}$; pro DSLRs use $12\text{ or }14\text{-bit ADC}$.

Conceptual and Documentary Photography

• Documentary Photography: Focuses on social problems (e.g., American Civil War by Timothy O’Sullivan, or the Great Depression via the FSA).
• Jacob Riis: Author of "How the Other Half Lives," documenting New York slums to drive social reform.
• Steve McCurry: Renowned for the "Afghan Girl" ($1984$) and color portraiture.
• Conceptual Photography: Starts with an idea rather than a location. Reality is often distorted using imagination and compositing.
  • Rick Amor: Combines elements of different photos into new realities.
  • Brooke Shaden: Fine art conceptual portraits.
  • Erik Johansson: Known for surreal, mind-bending conceptual scenes.