Mihiatt,
For what it is worth I have heard through the years that the difference when going from a 4 inch APO to a 5 inch APO is very appreciable but going from a 5 inch to a 6 inch is less so. I have never had a chance to compare two scopes of the same make only different in aperture to confirm this. I do own a 115mm or 4 1/2 inch TMB and like it very much. I have compared it against a Televue NP101 and found that objects did appear somewhat brighter with a very subtle increase in resolution when looking at star clusters.
Dan
For what it is worth I have heard through the years that the difference when going from a 4 inch APO to a 5 inch APO is very appreciable but going from a 5 inch to a 6 inch is less so. I have never had a chance to compare two scopes of the same make only different in aperture to confirm this. I do own a 115mm or 4 1/2 inch TMB and like it very much. I have compared it against a Televue NP101 and found that objects did appear somewhat brighter with a very subtle increase in resolution when looking at star clusters.
Dan
Danny Halstead
Moderator APM Forum
