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The largest refractor that I got my eyes on. Nope, it wasn't for sale.
Comment
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Comment by Alistair Gutcher on July 6, 2018 at 4:47pm
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Looks to be about 5" or so. There are plenty with larger aperture (ISTAR brand for example, 7, 8 or 9 inch refractors) but they tend to be only Achromatic, with plenty of false color.
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