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Originally Posted by [1ponders]
Yep it will be a challenge, the ol' Mercury is not much bigger than the moon, only a thousand or so kms in it. (4880 V 3500 approx)
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I didn't realise it is so close to the Raleigh Criteria for the PST (2995 km)!
Hmmm... should the plan be, then, to use max magnification in the PST? Say a 5 or 6mm EP or a barlow/powermate?
Al.