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At f/8, the optics will be essentially perfect, it was easy to make an f/8 mirror back then. Also, the heavy german mounts like that usually had some top notch, hand ground optics.
Now...the rings that hold the tube...they're probably rotating rings, which are PIMP.
Also, I don't recognize that drive assembly, but based on the size of the worm wheel and the 3 bolt clutch assembly, it might very well be a Byers gearset. One way or the other, it's MUCH higher quality than many of them (Parks, Meade) at that time, they all had much smaller gears.
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Mike Bradshaw
1980 911SC sunroof coupe, silver/black
Putting the sick back into sycophant!
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