Just did a three way. My old sharp 1976 C5 and a insane sharp 125ETX. Seeing is a good 8 tonite. This AT 102 ED is a shocker on the moon , it just flat out eats up the C5 on sharpness and contrast. The ETX 125 is hard to compare with since it a F/15 system vs F7 for the AT102 ED. With any given eyepiece the power is over double what the AT102 ED is. The 102 ed wins with nice sharp wide fields of view by far ove the other two scopes. With a 32mm Tele Vue Plossl or a 2" Wide Field 40mm Tele Vue no finder scope is needed as you just point near the object and it is in the FOV.
It is a toss up between the ETX125 and AT102 ED. The EXT gives insane high power views that are color free while there is some color noticed on the moon with the 102ed, just a tiny bit of purple at high powers. But the ETX can't give the crazy wide fov's the 102 ed can. I think both scopes offer up some great views, one being F/7 and one at f/15 is like a horse of a diff color. There are good and bad in all scopes. The focuser on the ETX is garbage at best while the foucser on the AT 102 ED is very smooth and tight. It would be hard for me to pick just one scope as the winner beween the 125ETX and AT102 ED.
I would say the AT 102 ED is about the best bang for the buck going these days.
Edited by CHASLX200, 24 March 2018 - 08:29 PM.