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the ed80 is a better all round instrument, can do photography -does wide fields & is fine for planets and lunar
the C5 is more specialised for lunar planetary, will do brighter deep sky objects also- limited field of view die to the focal length, it has the advantage of being very compact for the aperture size
what do you want the scope for?
for ed80 prob a 4mm eyepiece for planets/lunar, a 25mm or thereabouts for wide fields/finder ep, maybe a 6mm for in-between the 2. what budget do you have for ep's?
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