Baader clear filter

[KyleStoke]

Just a quick question is the baader clear filter a light pollution filter?

[spillage]

From my limited knowledge I think it is used to fill a hole in your filter wheel and keep dust out. I could be wrong though.

If the filters are parfocal then this can also be used to focus.

[LightBucket]

These filters are used for focusing and are just clear glass and are the same thickness as Baader colour of narrowband filters, it makes it easier to focus with full light being able to pass the filter, which is difficult with a coloured one, it has to be the same thickness so the focus point is the same, it can also be used as a dust filter, but thats not its primary role..

[KyleStoke]

Cheers Guys