Questions tagged “theory”

Ask the Unique Photo creator community — gear, technique, post-processing and more.

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551

What is the centre of perspective in a photograph, and why does it matter?

theory perspective composition lenses optics

Tom Axford

1y ago

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275

When is a photo truly one-point perspective, and can a scene have multiple vanishing points?

theory perspective composition cinematography vanishing-point

Photography Stack Exchange contributor

3y ago

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201

Why is the Screen blend mode called "Screen"?

darkroom theory photoshop blend-modes image-editing

Photography Stack Exchange contributor

4y ago

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328

Why do printers use CMYK instead of RGB on white paper?

theory printing color-management cmyk rgb

Photography Stack Exchange contributor

4y ago

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457

What does focusing mean in the thin-lens formula 1/u + 1/v = 1/f?

theory lenses optics basics focus

Photography Stack Exchange contributor

6y ago

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183

Why do 1/3-stop aperture values look uneven, like f/8, f/9, f/10, f/11, f/13, f/14, f/16, f/18?

f-stop theory aperture basics exposure

Photography Stack Exchange contributor

8y ago

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161

What characteristics of light matter in photography?

theory lighting light technique beginner

Photography Stack Exchange contributor

8y ago

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236

When do straight lines appear curved in wide-angle projections?

theory perspective fisheye wide-angle projection

Photography Stack Exchange contributor

9y ago

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211

What is an equiangular spiral grid, and how is it used in photo composition?

theory composition golden-spiral golden-ratio framing

Photography Stack Exchange contributor

9y ago

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167

Why doesn’t bounced light fully illuminate a cast shadow after multiple reflections?

theory lighting light-reflection shadows bounce-light

Photography Stack Exchange contributor

9y ago

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293

Can you determine a photo’s focal length from the image alone?

theory field-of-view perspective optics focal-length

Photography Stack Exchange contributor

9y ago

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183

Can super-resolution beat the diffraction limit in ordinary photography?

theory diffraction optics super-resolution image-quality

Photography Stack Exchange contributor

9y ago

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277

Are there research papers or books on how image aspect ratio affects viewer perception?

theory composition aspect-ratio visual-perception cropping

Photography Stack Exchange contributor

10y ago

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741

Simple explanation of principal planes and nodal points in a camera lens

theory lenses optics camera-basics focal-length

Photography Stack Exchange contributor

11y ago

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222

What is a color structure histogram, and how is it different from a regular color histogram?

theory post-processing image-analysis histogram color

Photography Stack Exchange contributor

11y ago

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712

Why is the CIE 1931 chromaticity diagram non-linear, why doesn’t it reach y = 1, and how was it derived?

theory chromaticity color-management cie-1931 color-science

Photography Stack Exchange contributor

12y ago

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348

Why do pinhole-size formulas use different constants?

theory diffraction optics pinhole image-quality

Photography Stack Exchange contributor

12y ago

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207

Are there theoretical limits to a lens’s maximum and minimum aperture?

theory lenses aperture f-number optics

Photography Stack Exchange contributor

13y ago

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184

Is emitted light fundamentally different from reflected light in photography?

theory lighting reflection light-quality color

Photography Stack Exchange contributor

13y ago

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160

Is Alhazen’s Book of Optics worth reading for learning optics basics?

theory books history-of-science learning optics

Photography Stack Exchange contributor

14y ago

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