Reply To: Increased detail with a 2” Herschel Wedge?

Forums Sun Increased detail with a 2” Herschel Wedge? Reply To: Increased detail with a 2” Herschel Wedge?

#617989
Dr Paul Leyland
Participant

According to Sidgwick, the resolution of a properly collimated 4″ refractor should be around 1.2-1.4 arcsec though, to be fair, those values are for resolving double stars rather than extended objects. That does, of course, assume that the ocular is illuminated by the whole objective. Back in Sidgwick’s day I suspect that 2″ eyepieces were extremely unlikely to be fitted to a 4″ refractor.

I have no idea what typical seeing is like at your location but guess that it is likely to be around 2-3 arcsec. That is a typical figure at Tacande Observatory though occasionally the seeing can be as good as 1-1.5 arcsec.

Neither do I have any idea about the acuity of your vision.

Based on this analysis, I suspect you are seeing limited. The phrase “most days” also leads me to this opinion.