[codemonkey (Lee)]

Originally Posted by Amaranthus

I also use the ZWO filters, which are (I think) also the same as those badged under Orion. Fine, and parfocal, yes. I use them for my planetary cam. Only $US90 from China... http://www.zwoptical.com/Eng/Cameras/filters/index.asp

Thanks for the heads up mate. I note that you're using Astronomik filters though, so why the shift? Was the upgrade worth it?

Originally Posted by Octane

Les,

If automating, most image capture software allows you to use filter offsets in autofocus routines.

H

Originally Posted by Bassnut

Maxim DL has a filter focus offset function.

That's what I suspected... more money lol.

Originally Posted by Paul Haese

If you can afford to buy Astrodon's do so. Even with my FSQ I have seen good focus matching from the Lum filter to the NB filters and even the colour filters are good. You don't have those on your list but I would never use anything else now. I had Astronomiks which were ok but even the new ones had some halo from reflections. Since getting the Astrodon's I really don't see that problem anymore.

Thanks Paul, but I'm afraid they're out of my league.