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Looking at the Stratus specs it would seem that they are the same EP. The Baader specs mention that the bottom part of the EP ("negative achromat lens group") is removable leaving an EP with larger FOV, as the top section of the EP is basically a 6 element Erfle design of longer F/L, although they don't mention by how much the F/L changes. Is this the case with the Stratus EP's as well Steve??
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