Keentune

Photography curriculum

10 chapters
·
217 concepts
·
free
Everything the adaptive question bank can teach and test in Photography, from foundations through advanced practice. Work through it in order, or start practising and let the questions find your level.
A. Exposure fundamentals
•
Aperture, shutter and ISO, and what each trades away.
•
One stop is a doubling or halving of light.
•
The same stop measured in aperture, time and gain.
•
A single number combining aperture and shutter.
•
Open one stop, halve the time, same brightness.
•
Trading the controls against each other at constant EV.
•
Choosing by whether motion, depth or noise matters most.
•
The meter assumes an average scene and is often wrong.
•
The reflectance the meter is calibrated to.
•
Why bright scenes meter dark and dark scenes meter bright.
•
Whole-scene pattern metering and where it fails.
•
Weighting the middle, useful for portraits.
•
Measuring one small area, and what you must then do with it.
•
Overriding the meter in stops, and in which direction.
•
At f/16 in bright sun, shutter is about one over ISO.
•
The moon analogue of the sunny-sixteen rule.
•
Highlights or shadows pushed past what the file can record.
•
Maximizing signal without clipping, and its cost.
•
Shooting a spread when the correct exposure is uncertain.
•
Program, aperture priority, shutter priority and manual.
•
Fixing two controls and letting gain float.
•
Holding a meter reading while you recompose.
B. Aperture and depth of field
•
Focal length divided by entrance-pupil diameter.
•
The f-number is a ratio, so it inverts.
•
f/1.4, 2, 2.8, 4, 5.6, 8, 11, 16 as full stops.
•
Intermediate detents and how to count them.
•
Stops between any two f-numbers on the series.
•
The zone that renders acceptably sharp.
•
Smaller aperture deepens the zone.
•
Closer focus shrinks the zone dramatically.
•
Longer lenses appear to compress the zone.
•
Roughly a third in front and two thirds behind, at moderate distance.
•
The blur spot that defines "acceptably sharp".
•
The focus point that extends sharpness to infinity.
•
The aesthetic character of the out-of-focus rendering.
•
Aperture blade count, shape and lens correction.
•
Why f/22 is softer overall than f/8.
•
Where stopping down stops adding real detail.
•
Most lenses peak a couple of stops from wide open.
•
What a large maximum aperture buys and costs.
•
Maximum aperture shrinking as you zoom in.
•
Measured transmission vs geometric ratio.
C. Shutter speed and motion
•
Duration of exposure, expressed as a fraction of a second.
•
Choosing shutter by subject speed and direction.
•
Deliberate blur conveying speed.
•
Tracking the subject with a slow shutter for a blurred background.
•
Cross-frame motion needs a faster shutter than head-on.
•
Handheld blur from the photographer, not the subject.
•
Hand-hold at about one over the focal length.
•
Adjusting the guideline for a cropped sensor.
•
Helps shake, never subject motion.
•
Rated benefit expressed in stops of hand-holding.
•
Removing the photographer from the vibration path.
•
Internal vibration at moderate speeds.
•
Silky water, light trails and empty streets.
•
Cutting light so a long exposure is possible in daylight.
•
Exposures longer than the camera's timed range.
•
The fastest shutter that fully exposes with flash.
•
Pulsing the flash so faster shutters work, at a power cost.
•
Firing at the end so blur trails behind the subject.
•
Film and very long digital exposures losing predicted response.
•
Approximate limit before stars trail.
D. ISO, noise, and dynamic range
•
Amplifies the recorded signal; it does not add light.
•
Doubling ISO is one stop brighter.
•
The native setting with the most dynamic range.
•
Pulled and pushed settings outside the native range.
•
Randomness of light itself, dominant in shadows.
•
Electronics noise added on readout.
•
Digital noise and film grain are different artifacts.
•
Two noise types with different fixes.
•
More light collected is the only real cure.
•
When raising ISO and lifting in post give the same result.
•
The span from clipped highlight to usable shadow.
•
Range falling as gain rises.
•
When one exposure cannot hold both ends.
•
Combining bracketed frames for extended range.
•
Balancing a bright sky optically instead of in post.
•
Lifting the shadows rather than darkening the highlights.
•
Why blown highlights are usually unrecoverable.
•
Recovering shadows and the noise it exposes.
•
Which end of the range you choose to protect.
•
Smoothing noise costs fine detail.
E. Lenses and optics
•
The optical distance that sets magnification.
•
What the lens actually includes, given a sensor size.
•
The three broad classes and their typical uses.
•
Roughly the sensor diagonal, giving natural perspective.
•
Subject distance changes perspective; focal length does not.
•
The flattened look of a distant subject with a long lens.
•
Near-far exaggeration from shooting close.
•
Equivalent focal length equals focal length times crop factor.
•
Crop factor also scales the depth-of-field equivalence.
•
What genuinely changes with format, and what does not.
•
Speed and simplicity against flexibility.
•
Why an inexpensive fast normal lens teaches so much.
•
True macro reaches one-to-one magnification.
•
Subject size on the sensor relative to life size.
•
Space between lens and subject, and why macro needs it.
•
Multiplies focal length and costs stops of light.
•
Closer focus at the cost of infinity focus and light.
•
Colour fringing from wavelength-dependent focus.
•
Corner darkening, optical and mechanical.
•
Straight lines bowing out or in.
•
Point sources smearing at the edges, critical for astro.
•
Stray light, contrast loss, and the lens hood.
•
Polarizer, ND and UV, and what each actually does.
•
Cutting reflections and deepening sky, at a stop cost.
•
Where the limiting factor actually sits.
F. Focus
•
One acquisition, locked, for still subjects.
•
Tracking a moving subject while the shutter is half-pressed.
•
Letting the camera decide, and why it can fail.
•
Fast directional focus using split light paths.
•
Slower hunting for maximum edge contrast.
•
On-sensor phase points combined with contrast confirmation.
•
Single point, zone and full-area selection.
•
Eye and face priority as a focus-area strategy.
•
The technique and its shallow-depth pitfall.
•
Separating focus from the shutter release.
•
When autofocus cannot see what you want sharp.
•
Edge highlighting as a manual-focus aid.
•
Zooming the preview to confirm critical focus.
•
Hyperfocal placement rather than focusing at infinity.
•
The near eye, at any usable aperture.
•
Blending several focus planes for extended sharpness.
•
Seeing the working aperture before the shot.
•
Setting distance in advance for a predicted position.
•
Setting an aperture and distance range for street shooting.
•
Angle of view shifting as focus distance changes.
G. Light and colour
•
Kelvin scale from candlelight to open shade.
•
Neutralizing a colour cast so whites read white.
•
Automatic guessing vs a named lighting preset.
•
Setting from a grey reference in the actual light.
•
Why white balance costs nothing to change in a raw file.
•
Two sources with different temperatures in one frame.
•
Matching a flash to ambient colour rather than fixing it later.
•
Small relative source, sharp shadow edges.
•
Large relative source, gradual shadow transitions.
•
Distance and modifier size both change apparent size.
•
Front, side, back and what each reveals or hides.
•
The dominant source that sets the exposure.
•
Lifting shadows to control contrast ratio.
•
Separation from the background.
•
Key-to-fill difference expressed in stops.
•
Illumination falling with the square of distance.
•
Why a close light lights two subjects unevenly.
•
Guide number equals distance times f-number.
•
Halving power is one stop.
•
Metered flash vs repeatable manual output.
•
Turning a ceiling or wall into a large soft source.
•
Shutter controls ambient, aperture controls flash.
•
Low warm sun with long soft shadows.
•
Twilight balance between sky and artificial light.
•
Cloud cover as the largest available modifier.
•
Deliberate tonal placement, not exposure error.
H. Composition
•
Placing subjects and horizons on the third lines.
•
Centering for symmetry and formality.
•
Lines that carry the eye to the subject.
•
Mirrored structure and the stillness it produces.
•
Repetition establishing an expectation to violate.
•
Foreground elements enclosing the subject.
•
Depth built by something near the lens.
•
Emptiness as an active compositional element.
•
Removing everything that is not the picture.
•
Getting closer as the most common improvement.
•
Size, contrast and colour competing for attention.
•
Distributing weight so the frame does not tip.
•
Odd numbers of subjects reading as less static.
•
Camera height changing the subject's relationship to the viewer.
•
Which half of the frame the story is in.
•
Tilted horizons as a distraction, not a style.
•
How the frame shape changes the compositional problem.
•
Recomposing after the fact, and its resolution cost.
•
Overlap, scale and atmospheric haze suggesting distance.
•
Complementary and analogous colour as structure.
•
Tonal separation directing attention.
•
Leaving room in the direction of travel or gaze.
I. Files, processing, and output
•
Unprocessed sensor data vs a rendered and compressed image.
•
Bit depth, white balance latitude and recovery headroom.
•
White balance, contrast, sharpening and colour.
•
Eight-bit vs twelve or fourteen and the banding threshold.
•
Lossless, lossy and visually lossless.
•
Tonal distribution, not a measure of quality.
•
Why the luminance histogram can hide clipping.
•
Blinkies as a clipping warning on the rendered preview.
•
sRGB, Adobe RGB and display gamut differences.
•
Profiles keeping colour consistent across devices.
•
Why editing on an uncalibrated screen misleads.
•
Mapping linear sensor data to perceptual tones.
•
Setting the ends of the tonal range.
•
Whole-image edits vs masked corrections.
•
Capture, creative and output sharpening.
•
Pixel count and perceived acutance are different things.
•
Up- and downsizing and the artifacts each introduces.
•
Profile-based fixes for distortion, vignetting and fringing.
•
Instructions stored separately from the original file.
•
What the file records about the exposure and the camera.
•
Redundancy as part of the workflow, not an afterthought.
•
Pixels per inch required at a given print size.
J. Genres and applied settings
•
Wide aperture, flattering focal length, eye focus.
•
Loop, Rembrandt, butterfly and split patterns.
•
Enough depth of field to hold every face.
•
Small aperture, low ISO, tripod, hyperfocal focus.
•
Working the edges of the day for direction and colour.
•
Fast shutter, continuous autofocus, burst release.
•
Long lens, patience and behavior prediction.
•
Tiny depth of field, diffusion, and stability.
•
Long exposures, noise control, and focusing in the dark.
•
Fast wide lens, star-trail limits, and tracking.
•
Zone focus, fast reaction settings, and discretion.
•
Perspective control and keeping verticals vertical.
•
Controlled light, clean background, and reflection management.
•
Bounce flash, mixed light and rapid subject change.
•
One versatile kit and a plan for changing light.
•
What may and may not be changed in a factual image.
•
Overlap, nodal point and consistent exposure.
•
Interval, exposure consistency and flicker.
•
Composing for tone and texture rather than colour.
•
Deciding which control is fixed before the others.
Keentune is not affiliated with or endorsed by the organizations whose documentation informs these maps.
All about Photography practice
Also on your phone
App StoreGoogle Play
All exam, test, and product names and trademarks are the property of their respective owners and are used here for identification and reference only. Keentune is independent study practice — not affiliated with, authorized, or endorsed by any of these organizations.
© 2026 SportaApp LLC