In my 28 f4.2 the magnification is roughly 300x with the 10mm Ethos and Paracorr. Sirius B is clearly separate from Sirius when viewing by eye but I had to expand (two fingers) the image on the iPhone before it would photograph. Hope that makes sense. I was actually testing out some alterations to the ServoCat tracking at the time.
So yes little dot around 11 o'clock.
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