6X 30 is small but there are good 6x30 finders , on my Tasco 10TE its a great finder almost as good as the 9x50 (similat FOV) on my 150 Mac , a proper Achromat with the correct baffle works great , but some of the modern ones are really bad , take it apart to see if it has a good cemented doublet and a large baffle
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