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Hi Ron,
No one seemed to pick up on a few of the questions about number of eyepieces, and barlows.
I would suggest on a 1200mm scope you probably dont want to go below 9mm in focal length. So I would suggest 3 eyepeices, 9-10mm, 20mm and your existing 40mm. Personally I prefer 9, 15, and 25mm but since you already have the 40 you need something more inbetween...
I wouldnt suggest a barlow, for cheap ones they arent all that good, and if you are buying one eyepiece and a barlow or two eyepeices there probably isnt much $ difference anyway so just get the two eyepeices...
Oh the reason for not going below 9mm (at least to start with) is they are more difficult to focus, and have a shorter focal length which generally means you need to be right up close with your eye (essentially glued to it) if you arent used to this is can be a bit difficult at first to do comfortably... especially if all you are used to is a 40mm.
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