Thanks Bill, that kind of makes sense that there is some kind of multiplying factor that is observer and instrumentation dependent. I was wondering how this all worked because I could see that the better the instrumentation and resolution you had, the more sunspots you might count. I haven’t tried using a Stonyhurst disc yet, that was something I was going to try and grapple with next. I think for the moment I will continue with my approach of projecting the image first and getting a handle on the basics before moving on to solar filters etc.
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