At the encouragement of a CN member who lives in the Tyneside area, I had a look at Izar last night with the Megrez 110ED stopped down to 58mm aperture.
Seeing was fair (about 6 Pickering).
At 131x, Izar showed a nice fat Airy disk with one concentric diffraction ring. The companion could be easily seen as a bluish "blip" on that diffraction ring. No ambiguity--smack dab on the ring. It was the only little blob or irregularity visible in the otherwise perfect appearance of the primary star. Upping the power to 205x showed it just as plainly.
At 110mm aperture, the companion appeared exactly where it did (in position angle) using the 58mm stop.
That was certainly the most "textbook" stellar diffraction image I've ever seen! Score one for small apertures.
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A few telescopes of dubious value.
Understanding wife and three curious cats.
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