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What intrigues me is that the 13.1" scope is about 3 times larger in light gathering capacity of the 8", yet the 8's f/4 ratio killed its bigger brother hands down! Amazing, Wavy, how the ratio works on extended objects.
Also, we struggled to see anything of the Sombrero in the 13.1" last night- the moon was hard on its heels. Yet again the 8" f/4 prevailed! Only half a stop difference between the two.
Oh, and the 28mm RKE I got from you Wavy is such a sweet match for the f/4 (actually, Peter and I call her 'F4'). NO coma noticeable in it. Yet the 15mm 68* EP I have, the coma is very, very noticeable, almost useless. I love it!
Used it with the filter on Eta Carina, WOW. And from Sydney. Can't wait to take her to a dark site.
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