For reference here are the part numbers for round cylinder lens from Edmund. All mgf coated

25mm dia
-25mm. 48-379. $61
100mm 48-360. $61

12.5mm dia
-25mm 48-376. $57
100mm 48-356. $57

these give 4x set for p73. Diodes

planters suggested the concave have the flat side to the diodes and the convex have the curve toward the diodes. Not sure if that has changed but was based on an older email. Thought this info might save people time looking it up. Note these are round optics for easier manipulation and mounting.

does any one have the numbers for the dr lava set? I have them and they are amazing for blue. Thinking they are 6x?