My question is similar to this one about a generic commander for the Nikon CLS system (IR wireless flash).
Now if I want my SB-25 to be slaved by this system the Nikon SU-4 does the right job. As I am interested in saving some money for a device I would use rarely and not in complex setups (even I conceive the Nikon one is not so high): is there any "no-name" alternative to this device (the SU-4)?
I know there are many alternatives with commander/slave on radio wireless but this question focuses on the SU-4. (I have already the SB-R1 without commander, using the body integrated flash and IR diffuser.)