Zeros. Now days and it has been like this for the past 15 years, Synta and GSO mirrors are of good quality. If you want to draw a lineup make new friends at a star party. Noisejammer (Toronto, Canada from an online thread entitled: Visual Only: 150mm Triplet APO vs 14 Dobsonian. THE lady ON THE dock, THE PBY, black cats, AND high barbaree (please click image) footnote 7 manhattan beach railway military reservation During wwii, in the period immediately after Pearl Harbor, the 8 inch Gun M1888M1A1 on Railway Mount M1918, 12inch Mortar M1890 on Railway. I usually go a month or so with one and then a month or so with the other. Fast forward to the present and my current 6F8 dob, the difference is like night and day in optical performance and mechanics so I would say the Chinese have improved by light-years, at least when it comes to making 6F8 mirrors.
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TE IP Reach :. . Before it reached Edwards an eyewitness reported hearing sirens. The eyepieces did become popular with people using all types of Scopes and since the first quality truss Dobs did not appear until nearly 10 years after the introduction of the Naglers, it would seem the eyepieces enabled the development of Premium quality Dobs. My 6 Newt with a 20 obstruction consistently shows more planetary detail than ANY of my 4 Apos ever did! . I looked through an excellent 5 apo (my old Tak TOA-130S) and a very good 8 Newt (8 f/7) at Jupiter and Saturn. For 200, its about as good a good scope as one can find.