Edition of 18/08/2026
The band of air that cameras find hardest to reach
Between the top of a ladder and the bottom of an aircraft's legal floor lies a strip of air roughly thirty to five hundred feet deep. Almost every photograph that makes a building, a site or a landscape legible is taken from inside it. This site is about how cameras get there, and what the choice of platform does to the picture.
Low Altitude Review is a reading site, not a service. We write about the technique: the physics of a lifting gas, the geometry that decides whether a facade looks straight or splayed, the airspace rules that govern a rope tied to the ground, and the reasons a client asks for a picture taken at the height of a floor that does not exist yet.
The tethered aerostat, a small non rigid airship or a shaped balloon held on a line, was for a long time the only quiet, patient way to park a camera two hundred feet above a site. Consumer multirotors took most of that work after 2013, and the tethered platform kept the corners the multirotor still handles badly: hours of station keeping, heavy payloads, long exposures with no propeller vibration, and indoor volumes. Both are covered here, and so is the arithmetic that tells you which one a given job actually needs.
Every page states its figures, gives the formula behind them where one exists, and names the rule or the reference it leans on. Where we are unsure, we say so instead of rounding the doubt away.
The texts, most recent first
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How blimp camera photography actually works
From the gas that lifts the envelope to the pan and tilt head under it: the eight things that have to be true before a tethered camera takes a usable frame, and the order in which a crew makes them true.
11 minute read Terms defined 5 notes
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Drone or blimp: what the difference is really made of
Endurance, payload, station keeping, noise, wind limits, ground footprint and legal ceiling, compared on the criteria that decide a job rather than on the ones that sound impressive.
12 minute read Airspace 4 notes
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Close range aerial perspective, and why height beats focal length
Moving the camera changes the drawing; changing the lens only changes the crop. What that means for a building shot from eighty feet, with the ground sample distance arithmetic worked through.
11 minute read Architecture 4 notes
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Lift, drag and the tether: the arithmetic of holding a camera up
Helium gives about one kilogram of lift per cubic metre at sea level. Everything else about a tethered platform, including how much altitude the wind takes away from you, follows from that single number.
12 minute read Terms defined 5 notes
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Preconstruction view studies: photographing a floor that does not exist
How a camera is placed at the future elevation of a high rise window, why the reference has to be a survey datum rather than a rough guess, and what makes such an image defensible later.
10 minute read Viewshed 4 notes
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Viewshed, view corridor, and what actually drives the cost of a shoot
A viewshed is a computed surface, not a marketing word. Reading one properly explains why two aerial jobs of the same height can differ in effort by a factor of five.
10 minute read View studies 4 notes
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Aerial photography for architecture projects
Elevations, massing, context and the roof: four separate briefs that architects tend to bundle into one request, each with its own camera height, light and lens.
11 minute read Perspective 4 notes
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Construction progress photography that survives a dispute
Fixed station, fixed focal length, fixed interval. The rules that turn a folder of site pictures into a record someone can rely on months after the concrete has cured.
10 minute read Cost drivers 4 notes
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Moored balloons, kites and drones in United States airspace
Two different parts of the federal aviation regulations govern a camera on a rope and a camera on propellers. Reading both explains most of what a tethered crew spends its morning doing.
11 minute read Comparison 5 notes
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A short history of the camera on a string
Balloons in 1858, kites in 1888, an earthquake panorama in 1906, observation balloons in the trenches, and the quiet century of survey work that followed.
12 minute read Terms defined 5 notes
Standing pages
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Glossary of low altitude aerial imaging
Forty seven terms, from aerostat and blowdown to orthomosaic and viewshed, each defined in one or two sentences so the articles do not have to stop and explain themselves.
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About this site, and how to reach it
Who publishes these pages, on what basis, how corrections are handled, and the contact address for pointing out an error.