Canon rangefinder lens finders came in a variety of configurations for use
in the accessory shoes of Canon rangefinder cameras (except the Canon 7 which had no accessory shoe):
1. Single focal length finders, without parallex adjustment.
2. Single focal length finders, with parallex adjustment by
turning a distance wheel surrounding the finder eyepiece.
3. Single focal length finders, with parallex adjustment by
moving a distance lever below the finder.
4. Single focal length finders, with automatic parallex adjustment
by means of a parallex adjustment pin located in the accessory shoe. These function only in the Canon VT,
VT Delux, L1, L2, L3, VL, VL2, VI T, and VI L bodies.
5. Multiple focal length finders with automatic parallex adjustment
by means of wheels around the finder or levers below the finder, as in 2 and 3 above.
6. Multiple focal length finders with with automatic parallex
adjustment by means of a mechanism in the accessory shoe, for the Canon V and Canon VI bodies.