Tele Vue's star diagonals are an enrichment to all astronomers due to their high-quality workmanship. You should not save on accessories under any circumstances, because what good is the best telescope if the prism used falsifies the quality of the final result due to inferior design...
Tele Vue offers a variety of Amici and Diagonal prisms, which do not represent an optical bottleneck in the overall system. You get the quality of optics from lens to eyepiece, without any noticeable loss.
The DSC-0125 is a 1/4'' - 90° diagonal star with 96% reflective aluminum coating. Each shell is milled from a solid block of aluminum and undergoes strict quality control.
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