Hi there,

Yesterday evening was quite clear and I could at last test the recommendations discussed herein.

I first tried to mount my iFinder scope only to find out I had no camera to use with it.

I know the scope came with a specific camera made by iOptron, but I just couldn’t find it.

I then tried to fit an ASI290MM mini into it (which I no longer used) but it didn’t work.

Therefore I abandoned the idea of using a small scope for polar alignment.

However, after locking the az and lat screws as much as I could,

I managed to get a repeatability of about 30’’ for the PA, which I thought was well enough for PHD.

And in fact it did seem to improve my guiding since the average went from about 1.5’’ to 0.7’’, as you can see on the attached figure.

There are still some dirty spikes up to 2.2’’ on RA, but the average is not so bad, and I thought the result was acceptable, as you can see on the last figure.

So it looks like tightening the hex screws was a very good idea.

Thanks all for your help!

EL

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