Copyright 2015 Steven Ford http://geeky-boy.com and licensed as public domain (CC0):
To the extent possible under law, the contributors to this project
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this work. This work is published from: United States. The project
home is https://github.com/fordsfords/astronomy/tree/gh-pages.
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These are plans on how to build a very primitive non-magnifying finder scope. Hopefully you won't need this at all, but many people can't get the hang of using the "both eyes open" method with a normal finder scope. If you have money to spend on a high-tech solution, get a "Telrad" for about $50 US. If you're on a shoe-string budget, read on.
Here's what you need:
Here's how to build it:
Here's how to adjust it:
The biggest problem with this finder is that the slightest nudge will knock it out of adjustment. I suppose I could glue it, but I don't want the thing to be a permanent fixture on my scope. Perhaps some kind of rubber cement that will stick fairly well but can be rubbed off after use? Let me know if you come up with a good solution.
Fortunately, the finder doesn't have to be precisely adjusted. Just so long as it gets the target into the view of the regular finder scope, you should be all right. Of course, you still have to deal with the upside-down view of the regular finder, but that's something you'll just have to get used to.
By the way, would it be helpful to include a picture or graphic? Or is it pretty easy to understand what I'm doing?
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http://www.geeky-boy.com/standard.html
then check it out now.