30 Strange Photography Terms Every Photographer Knows
Some of the strangest photography terms explained, from circle of confusion to moiré patterns.
When I first started learning photography, I quickly realized photographers speak a strange language of their own. Conversations were filled with odd phrases like circle of confusion, focus breathing, and pixel peeping, terms that sounded more like science experiments than camera techniques. Over time I discovered that this unusual photography vocabulary actually describes real optical behavior, camera technology, and creative techniques that photographers use every day. In this article, I’m sharing 30 strange photography terms every photographer should know, from quirky slang like spray and pray to technical concepts like hyperfocal distance and chromatic aberration. If you’ve ever wondered what photographers are actually talking about, this guide will help decode some of the weirdest and most fascinating terms in photography. Welcome to the wonderful world of photography.
1. Circle of Confusion
Despite the funny name, this is a real optical concept. It describes how large a blurred point of light becomes before our eyes perceive it as out of focus. It’s one of the key ideas behind depth of field calculations.
2. Focus Breathing
Some lenses slightly change their focal length when you adjust focus. When filming video, the image appears to zoom in or out while focusing, which is called focus breathing.
3. The Sunny 16 Rule
An old-school exposure trick. On a sunny day, set your aperture to f/16 and shutter speed to the inverse of your ISO (ISO 100 → 1/100s). It’s a quick way to estimate exposure without a meter.
4. Reciprocity Failure
Film photography has a strange quirk: during very long exposures, film stops responding to light normally. This breakdown in predictable exposure is called reciprocity failure.
5. Lens Compression
When you use longer focal lengths, objects appear closer together than they really are. Mountains look stacked, backgrounds look huge, and portraits feel flatter.
6. T-Stop
While f-stops describe the mathematical aperture size, T-stops measure the actual amount of light that passes through a lens. That’s why cinema lenses use T-stops instead of f-stops.
7. Chromatic Aberration
When different wavelengths of light fail to focus at the same point, you may see purple, green, or blue color fringing along high-contrast edges.
8. Bokeh
A Japanese term describing the quality of out-of-focus blur in a photograph. Some lenses produce smooth, creamy bokeh, while others create busy or swirly backgrounds.
9. Onion Ring Bokeh
A strange bokeh artifact where highlights show concentric circular rings, often caused by modern aspherical lens elements.
10. Cat’s Eye Bokeh
Near the edges of the frame, round bokeh highlights can stretch into oval shapes resembling cat eyes due to lens vignetting.
11. Swirly Bokeh
Some vintage lenses create backgrounds that appear to spiral around the subject, producing a dramatic swirling blur.
(A term vintage lens fans love.)
12. Vignetting
Darkening around the edges of an image. Sometimes it’s an optical flaw, but photographers often add it intentionally to draw attention to the subject.
13. Microcontrast
The subtle tonal differences between very small details in an image. Lenses with strong microcontrast can make photos look extra crisp and three-dimensional.
14. Edge Acuity
How sharp a lens remains near the edges of the frame. Some lenses are sharp in the center but softer at the corners.
15. Field Curvature
In some lenses, the plane of focus isn’t flat. Instead, it curves slightly, meaning the edges may focus closer or farther than the center.
16. Focus Stacking
A technique where multiple images focused at different distances are combined into one image with extreme depth of field, often used in macro photography.
17. Ghosting
When strong light sources bounce around inside a lens, creating strange floating shapes or reflections in the image.
18. Diffraction
When you stop a lens down to very small apertures (like f/16 or f/22), light waves begin to spread out and reduce sharpness.
19. Hyperfocal Distance
The focusing distance that gives you maximum depth of field, keeping everything from halfway to infinity sharp.
20. Rolling Shutter
In many digital cameras, the sensor reads the image line by line rather than all at once. Fast movement can cause objects to bend or distort.
21. Global Shutter
The opposite of rolling shutter. The entire sensor captures the image at the exact same instant, eliminating motion distortion.
22. Dynamic Range
The range between the darkest shadows and brightest highlights a camera can capture while still retaining detail.
23. ETTR (Expose to the Right)
A technique where photographers slightly overexpose images (without clipping highlights) to capture more shadow detail in RAW files.
24. Highlight Clipping
When bright areas become so overexposed that they turn completely white and lose all detail.
25. Color Cast
An unwanted tint in an image caused by lighting conditions or incorrect white balance.
26. Moiré
A strange interference pattern that appears when fine textures (like fabric) interact with the camera sensor grid.
27. Pixel Peeping
A humorous term for zooming into images at 100% magnification to obsess over tiny details.
28. Spray and Pray
A joking phrase for photographers who shoot rapid bursts of photos hoping one of them turns out well.
29. Chimping
The habit of constantly checking the camera’s rear screen after every photo, like a chimp staring at something shiny.
30. GAS (Gear Acquisition Syndrome)
A tongue-in-cheek term describing photographers who constantly feel the urge to buy new cameras and lenses.
