|
It depends how bad your LP is, to how you handle it. With mild LP you may not need a filter at all and only need to adjust camera settings. With more severe LP a filter will help, especially with nebula, less well with stars and galaxies. The best LP filter depends on how severe your LP is. At the lower end a wideband filter will be fine. If it's severe you may need something more narrow. Specifically which IDAS filter do you have?
Since LP filters don't increase the overall light, I don't see how exposure times can be shortened. In real world results with broadband OSC filters, some LP will still get through, but you will get an increase in contrast between nebula and background light which would allow you to increase exposure time.
Just experiment with and without your filter and see what happens.
|