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Greg,
I don't mean to beat a dead horse so to speak, but I think it's quite easy to mix up two different problems into one.
I'm quite convinced that in my system, for whatever reason, that I have a real focus issue, and large blue stars with halos, due to excessive violet out of focus light being picked up by the Trius and its high QE in that spectral region. Otherwise, how can I explain that I have so much better focus and smaller haols (in blue) using a filter that cuts at 410 nm? As noted earlier, my Baader filter passes to 380 nm which is 20 nm more than your Astrodons. And as I noted in the previous post the IDAS also improved the Astrodon filter I borrowed last night.
Problem 2 is probably completely unrelated to problem #1. I would also guess that the large stars one sometimes sees in other colours might be due to small well size. It is this second problem that I'm now trying to come to terms with. For me, though, it is much less of an issue than the unusable blue I was generating.
Peter
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