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The SV102ED is the Stellarvue version of a Chinese made 102mm f/7 ED doublet OTA that a few telescope companies are selling under their own names - WO and Orion both have a version as well as SV. There has been great debate on the CN refractor forum as to what if any are the differences between the OTAs sold by the various companies. On the astromart refractor forum Roland Christen of Astrophysics claimed that they are all identical and are assembled and shipped as complete OTAs by the Chinese manufacturer. Reports on the scope indicate its excellent value for money.
The SV-4 is in a wholly different class, its a high quality APO triplet made by SV.
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