Your search "porst compact-reflex" resulted in 2 Articles
Just because it's called Holga Filter Set you not necessarily have to use it with the Holga. This is why I fixed some filter from the set with scotch tape in front of the Porst compact-reflex. Take a look at the results after the jump!
Last Christmas, I got the Holga Macro Lens Set, which is available for € 10 in the Lomography Online Shop. It includes two lenses, which you can use with 120 and 135 Holgas. However, I have used it differently. Let me show you how after the jump!