I spent about an hour on aliexpress searching for condenser f5 and out of hundreds of products I could not find an 12.7 diam with 5 mm focal as is the specs.
Do such things really exist and if so does anybody that managed to purchase that have a current link to that?
Thank you, Adrian
The condenser lens is plastic, with a flange. The overall diameter with the flange is 12.7mm (or 13mm or 1/2"), the lens part is smaller.
There are a few suggestions of places to get them on Sourcing non-printed parts - General - OpenFlexure Forum.