Quote:
Originally Posted by bytor666
I'm already well aware of this fact.....HOWEVER if you read what I said, it doesn't matter that much on the moon because it is so bright. You can throw all the math, etc you want at me, but the eyes do not lie.
I use the mask on the moon and Jupiter with excellent results.
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All I know is that I'm going to see (and have seen) smaller craters with my 10" telescope than with my 4" telescope. Brightness does affect resolution but so does contrast and probably more so. I would not consider Jupiter so bright that it requires an aperture stop and then expect to see the same amount of fine detail once stopped.
I see small craters simply disappear when using my Meade #905 variable polarising filter on my C9.25 or 10" Newtonian, (the latter with 2x Barlow to reach focus). It could be the optical quality of the filter but something is significantly affecting the resolution when darkening the image. I would think it is a function of crossing two polarising planes but I do not have another brand of filter to test this.
I did a search on the web for some info and came up with the following which I am yet to fully comprehend:
http://www.houseofoutdoor.com/testra...ES_highres.pdf
I'm sure there's going to be a lot more to this debate.