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Ran it a hundred times now - it's the second set of data with the new Baader UV/IR filter causing the issue - seems ONE of the 2 filters is NOT optically flat, and as such, despite even using FFT routines, the 2 will NOT register properly. I redid the first set of data with some new processing techniques I relearned (thanks Louie!), and I believe those to be superior to the Baader UV/IR set (sharper stars and less halation/bloat with the Optolong!). So, as I mentioned, the Baader is now relegated to the visual role in the front of my Baader Maxbright.
Looking at the 2 sets layered directly on top of each other, the scale is SLIGHTLY different. It would appear that the Baader is disturbing the flattener, altering the optimal spacing, whereas the Optolong did NOT. In my original calculations when having the adapter made, I DID shorten the length by 1.4mm to account for the approx. 0.7mm of each glass substrate, and that worked precisely with the Baader LP/Opto UV mix, but NOT the Baader/Baader.
Long story short, reverting to the Optolong LOL
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