They are supposed to be parfocal but not ir block. The set came with a clear filter and a 1.25" IR filter but I can't get that into the chain so I'm using a 2" badder on the nose of the wheel. Looking at these Red and Green channels they don't seem to be very parfocal at all and the blue channel looks bloated like the green. However, maxim gives them similar FWHM values in the quality section when stacking. It tries to throw out 1/2 the luminence subs
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Try again tomorrow night I guess
At least I can see the little starlight has the scale I'm after for galaxies, which is all I really want from it
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