I thought I would start this list - being a forum that is trying to help others out, as someone suggested before - I believe we should start listing the achromat that are working and working well and where we purchased them from :

I personally found mine in a slide projector and in an panasonic slide viewer (square).

I think I need to clarify something here so when people saying achromat, it's really achromat.
Achromat is cemented doublet or triplet with coating
Below is a website explaining about achromat, read for yourself, thanks.
http://jmloptical.com/level2/Searchframe.aspx?SearchText=achromat&imageField.x=13&imageField.y=10

Quyen

i think mandy means a lens you can use to focus on objects that are really close to the camera.

What I am looking for is hopefully a reliable list of achromats that work and work well (and where you got them)