Before you spring for a Canon AE 1, or a Pentax K1000 please please please consider a much cheaper option, an option which can do more for much much less money.
The EOS range of Canon Cameras, with the EF mount not the FD mount can help to grow you photography came without killing your bank account.
This camera introduced the newly-developed, Multi-BASIS AF sensor which provided three autofocusing points.
One-Shot AF and predictive AI Servo AF are featured as AF modes. In the Full Auto mode, the camera detects whether the subject is still or moving with signals received from the Multi-BASIS. The AF mode is then set automatically.
The three focusing points are red LEDs in the viewfinder’s image area. They are easy to see and any focusing point can be selected manually with a button and dial. A bar-code book was also provided to enter the bar-code for camera settings needed to achieve the effects shown in the book’s sample photos.