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Originally Posted by janoskiss
I've seen a few examples of Meade #140s. At best they are good optically but need a bit of work (barrel blackening) to make them perform well. At worst they have bad astigmatism and are useless (the one I ended up with and still have is like that). IMO they are not worth it unless cheap and you know how to tell a good barlow from a bad (defective) one and buy from a dealer who will refund.
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I agree with the above statement, mine was somewhere in between. Not
only that, some months after purchase the coatings on mine started to
pit or became mottled. I kept it in the same EP box as with all my high end
ep's and barlows along with a couple of packs of silica. All my ep's and
barlows are cleaned in the same careful manner using pharmaceutical
grade isopropyl alcohol, yet this only happened to the Meade #140 apo
barlow.
Rob