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They will all work very nicely, but as a set of three they are probably a bit close in terms of magnification (assuming f5)
7mm = 142x
6mm = 166x
5mm = 200x
For planetary use, the 7 and 5 would be a better set which would give a great spacing especially with a 2x barlow if you have one.
If you are interested, I can reduce the price by 60 bucks and i'll keep the 6.
Last edited by AstroJunk; 07-07-2018 at 11:54 PM.
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