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I have a vintage Oehler 33 Chronograph that I've had for about 25 years. I like the Oehler because the sky screens are separate from the computer and connected by cables. As several have stated, it's real easy to blast the computer. I my case, I just lose a screen.
I set my screens into a framework of wood 3 feet long then use saw horses to support the screen frame. At the forward end of that frame, I have a 3x5" plate of 1/4" steel plate angled upwards. There are several lead streaks showing that the plate saved the sky screens on numerous occasions.
This may also help.......... I installed a large clip on the rear of my sky screen frame. I always clip a target to that fastener to provide an aim point. It worked fairly well!
Flash
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