Learning Photography Course — 3. Every Kind of Camera
Module 3 of the Learning Photography Course. Every camera ever made has the same three parts: a hole, a shutter and a recording surface. Only four things genuinely differ between them — the size of the recording surface, whether the lens comes off, how you see the picture before you take it, and how much computation sits between the light and the file. This module works through every kind of camera against those four.
Single-use cameras and why a fixed exposure works at all; digital compacts, and the correction that the type one-inch sensor is not an inch; bridge cameras and what a sixty-times zoom actually costs in aperture; the single-lens reflex, drawn as a mechanism — the mirror, the pentaprism, the blackout and the one advantage no successor has; mirrorless, and why taking the mirror out fixed front-focus, shortened the flange distance and opened the adapter market; sensor size treated as the three separate questions it really is, because field of view, depth of field at the same framing, and noise have three different answers and the argument only gets heated when they are merged; medium and large format, leaf shutters and movements; and the phone, where a sensor that should not compete competes anyway by stacking frames.
The module closes on the industry in real numbers, read from CIPA's own statistical release rather than from reporting of it.
Figures are sourced. Where a number could not be traced to a primary source — the precise 2010 peak, and any figure for stops of stabilisation — the module says so and declines to assert it.
Educational documentary. Not financial or investment advice.
In these topics
Tags
- types of camera
- photography course
- mirrorless vs dslr
- sensor size explained
- crop factor
- full frame vs aps-c
- how an slr works
- pentaprism
- bridge camera
- compact camera
- medium format
- phone camera vs camera
- computational photography
- camera market
- cipa
Sources and credits
Original narration, artwork, score and editing assembled locally for Forwards or Backwards. No third-party footage, music or imagery.
- Narration: Kokoro-82M
bf_emma, British English. - Imagery: generated locally, 10 environments, 10 matched states.
- Score: original procedural pad, ducked under the narration.
Primary sources
- CIPA, Production and Shipment of Digital Still Camera, December and January-December 2025 — worldwide shipments, full calendar year: total 9,438,876 units (111.2% of 2024); built-in lens 2,436,911 (129.6%); interchangeable lens 7,001,965 (105.9%); mirrorless 6,311,054 (112.5%); single lens reflex 690,911 (69.3%); ILC under 35mm 4,458,696. Read directly from the association's own PDF on 16 September 2026.
- CIPA, cumulative January-April 2026: mirrorless 2,048,925; single lens reflex 160,087; built-in lens 790,164.
- IDC, worldwide smartphone shipments, full year 2025: 1.26 billion units, up 1.9%; released 5 March 2026 and labelled preliminary. The earlier figure of 1.25 billion was a December 2025 forecast and is not used.
- Derived in the module and labelled as derivations: mirrorless share of interchangeable-lens shipments 90.1%; SLR share of all shipments 7.3%; about 133 smartphones shipped per dedicated camera. The three category figures sum exactly to the stated total.
- Not asserted for want of a primary source: the precise 2010 peak (carried as 'about 121 million' from reported CIPA annual data, since the association's 2010 monthly documents are no longer served); any figure for stops of image stabilisation; any per-manufacturer market share; any unit figure for film camera sales.
Figures were not re-pulled within 48 hours of export; re-verify before publication if the film is held.
Not regulated financial advice.