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I've got two 4" Unitrons - one is the photo equatorial and the other is the equatorial. I don't have an alt-az and I was very tempted to round the collection out with that one! They are a bit of a lump to haul around, and I have one with stellar optics (pun intended) and one with very ordinary optics. I spent a fortune on the poorer getting the coatings re-done and was able to eliminate the ghost images, but it still has about 1/2 wave of spherical abberation. For solar system work they're great, and chasing the Messier objects it's kind of fun. But the primary purpose is to sit in my living room as a work of art. Someone on the Unitron forum (Yahoo groups - come and join!) once said:
"Unitrons, you spend more time looking at them than through them".
Enjoy, and welcome to the club!
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