Minolta SR-7

The selling point in 1962 was the meter, and that is still the reason to pick one up. The SR-7 was the first 35mm SLR to carry a built-in CdS meter, and that is not a soft marketing claim, it is well documented. CdS could see in dim light where selenium gave up, and Minolta put the readout up on the body where you matched it against a needle. It sat at the top of the early SR line as the metered body above the SR-1 and SR-3, the one you bought if you wanted a light reading without clipping a separate meter to the strap.

Pick one up and the first thing you notice is weight. This is a brick, all brass and chrome, and it does not flinch. The shutter is a horizontal cloth focal-plane unit running from one second to about 1/1000, with flash sync at 1/60. It is not whisper quiet. You get a solid mechanical clunk and a little mirror jump, the sound every sixties SLR makes when it works. Film loads the conventional way, back off, sprockets, wind on, nothing clever. The finder is reasonably bright for its day with a plain ground-glass focusing screen, though by modern standards it is a touch dim and the corners fall off.

The meter is the heart of it and also its biggest liability. The CdS cell is uncoupled in the sense that you transfer the reading to the dials yourself; it does not move the aperture for you. More to the point, it ran on a mercury battery that you cannot buy anymore. Most SR-7s out there today read wrong, read erratically, or do not read at all, because the cell aged out or the mercury voltage assumption is gone. People chase adapters and recalibration, but plenty of these bodies are now effectively meterless.

That is exactly where the camera becomes simple again. Treat the SR-7 as the all-mechanical machine it is at heart, set shutter and aperture by hand, and take an incident or spot reading from the Zone Light Meter app to place your exposure. It stands in for the cell that finally died. The shutter and the lenses do not care that the CdS gave up; they keep working.

The SR mount anchored Minolta's manual-focus system for decades, and the lenses are what keep people in the family. Rokkor glass from this era is cheap and genuinely good, and a body like the SR-7 is a low-cost door into it. Cross-shop it against a Pentax Spotmatic or a Nikkormat. The Minolta usually costs less and feels every bit as solid, which is why students and people who want a heavy, dependable manual SLR keep buying them. The weakness is plain enough. Buy the SR-7 for the build and the glass, not for a readout you can trust.