I've made side by side comparisons with my high quality 10" f5 Newtonian 10" f12 DK. I even had a 10" stock production 10" f6. I've compared them all to 8" apos and 6" apos. I've seen times when the 10" reflectors were superior on planets and I've seen times where the smaller apos were better on planets.
I don't think anyone questions these statements but such conclusions are the result of seeing conditions, not telescope characteristics. You would not come to these same conclusions under ideal observing conditions.
The reality is that the larger percentage of folks with scopes live in areas where ideal observing conditions are rare or non-existent. Still, they have the right to discuss how a given telescope may function in comparison to another under ideal observing conditions and I think that is really the topic here. (The race car driver is not necessarily qualified to determine the best suspension design although he may well be aware of the end result. A winning team works together to share knowledge.)
Anyone who makes blanket statements or resorts to numerical figures as an answer is obviously inexperienced, because if they were in fact hands on and experienced in the claims they make, they would know reality does not work that way.
Very true. But let's not discount the value that an experienced glass pusher and a qualified mathemetician can bring to the discussion. I for one, have learned a great deal regarding obstructions, Strel, MTF, and numerous other topics, by those who have taken the time to post an explanation behind the theory that I could not otherwise comprehend. I welcome their contribution.
If people spent as much time at the eyepiece as they do making numerical claims, they'd learn a thing or two about how telescopes actually perform in reality.
I will probably remain an uncurable skeptic. I enjoy learning about telescopes and their attributes. My scopes and eyepieces are modest. While I don't have a great deal of experience with superb instruments under ideal conditions, I have enjoyed the views I have had when folks have shared their eyepiece time with me. In my experience, Ed's statement that a well made 6" Newt can match a similar sized APO is a fair statement. I have enjoyed following the discussion.
Happy New Year to all,