The single lens reflex or SLR is a camera that allows you to see through the single taking lens by way of a corrective pentaprism and a flip-up mirror. This way you get a very accurate estimate of your final image. Older SLR cameras had a fixed lens, but the vast majority accept interchangeable lenses, making these cameras extremely versatile. There are many standards for lens mounts, but a perennial favorite is the M42 or Pentax screw mount, which is used by older Pentax, Vivitar, Yashica, Praktica, and others. If you have an SLR body that accepts M42 mount lenses, you can take advantage of some incredible world-class vintage lenses for often very little $$.
If you have information to add or would like to ask questions about these cameras, their use or care, or even just want to say ‘hey’, feel free to email me, I always enjoy hearing from you!