I agree - I am searching the WO website and all I can see so far is the
https://williamoptics.com//william-o...lattener-68-ll but I am wondering if my model is even older than that - will try and see if there is any model or post a picture of it.
The spec of the model I found seems to say only 51.5mm is needed from the rear of the cell - and I am way past this distance!