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emutz
sage
Reged: 02/15/06
Posts: 282
Loc: Pensacola, Fl
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Re: Custom Scientific and Astrodon filters
05/17/08 09:25 AM
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I had CS filters where the color filters were parfocal. However, I discovered too late that the Ha, OIII, SII CS filters were not parfocal withthe color filters. I found this pretty annoying. Eventually, I sold the CS filters and bought a set of Astrodon E-series filters. Now everything is parfocal. The color sub images with my ST-10 seem a little brighter (especially with the blue channel) than with the CS filters. Astrodons promise a 1:1:1 RGB exposure ratio. However, I have not found this to be true. While I expose the same number of B,G,R subs, I always have to adjust the blue ratio to around 1.4 in Maxim when doing a color combine.
Overall, I like the Astrodon's better, mostly because they are parfocal, not because the images seem to have better color.
Just my 2 cents....
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