I bought second hand projector on eBay. I though is was going to be perfect as the lava lamp I have but it didn't. Can someone address my questions regarding projector's behaviour?
1. It has some darker area in the middle of the projection. It's not too dark, but It is there. Lenses are clean and transparent.
2. It doesn't give me perfectly sharp image. Sharpness is not the same in different parts of the projection.
3. How the lenses inside the system should be placed? Mine are flat side to the lamp.
The construction of the projector is pretty simple so my thoughts are that the unit is ok, but who knows.
Mathmos declined all my questions.