Thanks for the break down of versions.
Speaking of non-D lenses... I noticed that there were non-D 50mm f/1.8 (MIJ) lenses on BnS months earlier... What does non-D mean? D is for distance metering right? Non-D AF versus AF-D... what are we missing out on here?
I thought D means having an aperture ring?
AF-D and AF lenses work similarly, in that they both have aperture rings, and they both uses screw-drive AF, and you lock to minimum aperture when using camera to control aperture.
The difference is that in the AF-D lens, they have a chip in there that will read distance information and send it back to the camera body. AF lenses work the same, but do not have that chip and will send nothing back to the camera body.