Thank you very much Erik, John!
I appreciate it a lot! I am really excited. I agree that Meopta isnt bad but I can look for another lens (23.5mm is the thread on it but its adapter is 39mm I think. Then I can look for another lens.
I am thinking that I can stuck grade filter where the matt glass is located above the condenser. What do you think? What do you suggest for filters? Ilford gelatine filters, which can be cut where needed?