In the past, i have found that using a barlow has made it impossible for me
to achieve a good focus on anything, but this may just be a caused by
bad quality barlows and EP's. I bought the 10" GSO a couple of months
ago, and very happy, however i has the same issue, couldn't see any detail
on mars either, but I, also, am mainly interested in Deep space Objects.
Davidpretorius: Do you have any info on the dob drive? I would like to have a
look at, maybe give it a go.
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