Asahi Pentax K1000 35mm with 50mm f/2 S#7910823
The Pentax K1000 is one of photography's greatest, most popular and longest-lived cameras.
The Pentax K1000 is simple. It does exactly what it needs to do, and nothing more.
Exactly like Apple, simplicity is the K1000's greatest strength. All the irrelevant foolishness that chokes fancier cameras, and especially digital cameras, never gets in the way of a great picture with the K1000. While DSLR shooters are standing there cursing at their cameras when they can't figure out why it won't take the picture when they press the shutter, the K1000 just keeps shooting.
The Pentax K1000 is a 35mm SLR. It is completely mechanical and needs no battery to run, except for one A76 cell to run its light meter.
Unlike the "automated" digital nonsense with which too many people burden themselves, the K1000 has only three shooting controls: aperture, shutter speed and focus. (You also set the film speed when you load it.)