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Hello Prickly,
Sorry about the problem with the link. I simply copied and pasted the quoted link and didn't know I needed to use the hyperlink tool. The result was that the link wasn't complete. I fixed the link so it does work now. Have a look at the article, it's very interesting.
Thanks for the advice too. I was trying to work to a max magnification of 2.4x the lens diameter in mm. For the 80mm this would yield a max mag of 192. I've tried 200x with a 6mm (3x barlow) and 300x with a 4mm (3x barlow). Good seeing is needed with both but the 6mm combo seems better. The barlow is not the best so I'm hoping that the new one will improve the situation.
Regards,
Glob.
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