Canon AE-1

By the mid-seventies automatic exposure existed but was expensive. Canon's answer was not to add automation to an existing camera but to design one around a processor from the ground up: five major units and twenty-five minor ones, which Canon says cut the parts count by three hundred, and together with automated assembly that is what made it cheap enough to build at volume. Canon calls it the world's first 35mm AE SLR with shutter-speed-priority metering and a central processing unit. It arrived in April 1976 at 81,000 yen with the FD 50mm f/1.4. Then Canon did the other thing. It ran a TV commercial campaign on American national networks, fronted by world-famous tennis and golf players; Canon says this was a first for a Japanese camera manufacturer. By 1981, according to Fstoppers, an industry analyst was calling the AE-1 the Chevrolet of the 35mm market, which was a remark about volume and not about prestige. Canon has never published a production figure. The serial-number estimate usually quoted is around 5.7 million, which we cannot confirm; what is safe to say is well over a million bodies, and that few cameras have introduced more people to photography. One detail that helps explain its price: the top plate is moulded ABS plastic, finished in satin chrome or black to look like metal, and Canon used structural plastic elsewhere too. It saved weight and cost, at the expense of impact resistance. Keep it separate from the AE-1 Program, which is a different camera from April 1981 — that one adds program mode, LEDs in the viewfinder and interchangeable focusing screens.

A first film SLR, and it has been exactly that for fifty years. Shutter-priority automation means you pick the speed and stop thinking about the rest. Street and travel, where shutter-priority is the natural way to work. Cheap entry to the FD lens pool, which is enormous and still inexpensive. An nFD 50mm f/1.8 is the obvious first lens; the FD 50mm f/1.4 is the better one; nFD 35mm f/2 and 24mm f/2.8 for wide, FD 85mm f/1.8 and nFD 100mm f/2.8 for portraits. Feeding a mirrorless camera. FD lenses adapt to mirrorless with a plain mechanical adapter and reach infinity. Where it falls short: it is completely battery-dependent. No battery, no camera — not one mechanical speed. Carry a spare. Shutter priority only: no aperture priority, no program. If somebody wants program, that is the AE-1 Program. If they want aperture priority, the AV-1 or the A-1. 1/1000 top speed and 1/60 flash sync are both modest. Fast film, bright sun and a fast lens will run out of shutter. No mirror lockup, and the focusing screen is not user-interchangeable. And in our view the plastic top plate and the squeal-prone mirror governor make it less robust over the long run than a mechanical body like the FTb.

The classic false alarm on this camera. The advance is a manual lever, so a weak cell still lets you wind on while being too weak to release the shutter, and the camera feels alive and behaves dead. Fit a fresh one before you conclude anything at all. The AE-1 takes one 6 volt cell; the specification says which.

The famous one, and it is real but it is not fatal. Fire at 1/30, 1/60 and 1/125 in a quiet room with the lens off. A healthy body goes clack. A sick one adds a squeal or a winding-up whine as the mirror returns, and that is dried lubricant in the mirror governor, not a broken camera. It is a well-known repair. Watch the mirror while you do it: it should snap back, not drift.

Go through the lot, 2 seconds to 1/1000, and B. A camera that winds but will not release, or releases only sometimes, with a fresh cell fitted, points to an electromagnet or a circuit problem, and that is a different and worse conversation than the squeal.

Fresh cell, ISO 100, and compare the indicated aperture against a handheld meter or a phone app, indoors and out. Then sweep from a bright window to a dark corner: the needle must move smoothly, not jump, stick or slam. A needle that sits at the bottom in all light is a dead cell or an electronic fault, not a calibration problem, and telling those apart matters because one is a new battery and the other is a technician.

On this camera that usually is the light seals: in the film door channels and as a foam strip above the mirror. Run a cotton bud along them. Black and sticky means they have gone. It is an evening's work at home and the material costs almost nothing.

White or green crust on the spring or the plate. Also the door itself, which is flimsy and commonly cracked or missing — a missing door is not a broken camera, but it is a camera that will lose power at the worst moment.

Ten full strokes, firing each time. Even and positive, no grinding or dead spot.

Take it off, set it to f/16, and work the aperture lever on the back by hand. The blades must snap shut and snap open, instantly and dry. Oil on the blades makes them sluggish and every frame overexposed, and people blame the camera's meter for it.

The famous one, and it is not the shutter — it is the mirror governor. The factory lubricant in the mirror governor has dried out, and a dry bearing in it squeals as the mirror flips. You hear it as clack-EEEK. The well-known home remedy is to remove the cover plate around the lens mount and put one small drop of oil onto the governor with a pinpoint oiler. It is widely done, and owners report that it can be temporary: one says the squeak came back after about three rolls. It is also genuinely disputed: plenty of experienced people vouch for it, and a former Canon technician rejects it outright and says the job needs the mirror box out and a full service. What goes wrong is over-application — too much oil migrates onto the electronics or the cloth shutter curtains. The UK repairer JFR Film calls injecting oil terrible practice that can cause more issues. If it is done at all, the lubricant is thin watch or clock oil, one drop. Not WD-40, not 3-in-1, and not the vegetable oil one popular online guide used, which a commenter on that guide warns can spoil and jam the mechanism. The proper repair, as that former Canon technician describes it, is the mirror box out, the governor gears lubricated, the release magnet and AE contacts cleaned and curtain timing adjusted. He puts an AE-1 at about two and a half hours of bench time.

Canon specified a 6 volt 4G-13 mercury cell or a 6 volt alkaline from the outset, so unlike the FTb this camera has no voltage problem. The mercury type is long gone and you may find one corroding inside a camera. Fit a 6 volt 4LR44 alkaline, or better a 4SR44 silver oxide, which holds voltage more steadily. Metering is unaffected. The other side of this: the camera is electronically controlled with no mechanical speed, and Canon's manual says the shutter will not work without sufficient battery power. A weak cell stops it outright.

The real battery problem. Cameras stored with a cell in for decades leak. Light surface corrosion cleans at home — white vinegar on a cotton bud, dried thoroughly, then burnished. Corrosion up the wire into the body is a technician's job. Take the cell out when the camera goes away.

Two consequences: light leaks on the film, and — worse — residue that glues the mirror up or drops crumbs onto the focusing screen. This is a proper home fix and a satisfying one. Pre-cut kits for the AE-1 are cheap and widely sold; most of the work is removing old goo with wooden toothpicks and isopropyl, and keeping solvent away from the shutter curtains.

Three documented causes. A weak battery, always test that first. Contaminated magnet faces, where an oil film you cannot see stops the armature releasing, and the faces need cleaning; a magnet can also fail outright and need replacing. Or cracked tracks on the flexible circuit that runs over the pentaprism, which a former Canon technician says the AE-1 is prone to: checked for continuity with a multimeter and bridged with a jumper wire. The magnet clean is at the edge of home-doable. Board-level work on a camera this cheap is usually not worth paying for; a second body often costs less.

Two different things: real calibration drift, where the needle reads but reads wrong, and dead-stop failure, where it bottoms out regardless of light — once the cell is ruled out, that is an electronic fault. The AE-1 is a poor do-it-yourself candidate here. A related fault is the thin tungsten wire that links the ISO dial to the shutter-speed dial: the UK repairer JFR Film gives the symptoms of a broken one as a meter that no longer follows the ISO setting, or speeds that will not change. But a body whose meter is off by a fixed amount is still perfectly usable if you offset the ISO dial, and that is worth knowing before you write one off.

It is moulded plastic finished to look like metal, and less impact-resistant than a metal one. Wear to the finish is cosmetic.

Sold with the camera, but severe on this body specifically: the AE-1 sets the aperture, so blades that will not close mean every frame is shot wide open and grossly overexposed, with no warning from the meter. Test every lens as described under Troubleshooting. The repair means opening the lens, and for most people that is a technician's job.

The FD 55mm f/1.2 AL uses thoriated glass and is mildly radioactive. Thorium decay turns the glass amber over time, which exposure to sunlight or UV light has been reported to reduce. It is a desirable lens, not one to avoid, but the yellowing should be disclosed.