TheSkySearchers

Hello there.

I own a Celestron 9x50 RACI finder and I've always struggled with the adjustments screws of it.

It seems that the only way for me to get it aligned with the scope is to leave one of the fine adjustment screws completely loose, but this way it gets somewhat unstable and it is easily misaligned again.

Also I have to adjust it at every session since moving the scope will most likely mess the finder's position a little.

What am I missing? If I tighten both screws one of the axis gets way out of target...

Tks and clear skies!

Make sure the O-ring on the front is in the grove on the finder and fully seated in the frame..
I had to tighten the spring on the pin.

Hum. It looks like it is fully seated.

Here are some pics

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There is an allen screw to adjust the spring tension. I have seen where some have replaced the spring with a screw.

I see. Didnt notice them before.

Will try, tks mate

I forget where I found this guide but it is well put together. It’s the manual that should have come with the Celestron RACI. I was able to focus the findescope as well as focus the reticle.
I got it aligned and then tightened the set screw which is an Allen screw. Just snug not go hulk and screw it down. I can now slide it the holder (shoe or rail, whatever it’s called) the check my scope alignment and it maintains it.

A tip for beginners, always check the alignment of the finderscope with the telescope. I used to assume that if it was done once it stayed, well save yourself the trouble, time and losing confidence on operating your telescope.

Clear Skies!