I guess you either put up with it and buy a scope from them, or you don't.
I think it makes more sense to go by reviews, honestly. Lens design has a lot to do with color correction. You can mess up a lens with good glass or make an overachiever with cheaper glass.
I have a 150ED, which doesn't disclose glass type. It has some chromatic aberration, but honestly, I don't think you could make an ED doublet of 150mm and F/8 focal ratio that didn't. It doesn't have enough to be a problem to me.
Yes , I think you hit the nail on the head , I have an ED100 APO ( yes its an APO ) with the said FPL53 and its almost CA free on all objects , it's lack of SA and good coatings allow easy 250-300x on good nights .
Now the ED150 with un-disclosed glass types is almost exactly like my lovely Long Perng 110mm f6 APO ( yes its an APO ) the same scope as the Orion EON 110mm f6 doublet but un-branded ,,, anyway my 110mm f6 when compared to my 100mm f9 is as CA free on all objects , it's SA control is probably better as it does show a better star test using quality TV eyepieces at stupid high powers and that's saying something with only 660 mm to play with .
Long Perng don't say what the mating element they used with the lovely FPL51 in this scope , the same as SW don't on the ED150 but that does NOT ! take away that these scopes perform excellently for the price , it works and man they could be using crushed up tire's as the mating element ,, but by golly it really works .
Who are we to complain ? a 110mm f6 or 150mm f8 or any of the other scopes out there with the image quality seen here for little $$$$ ,,, come on .
This is where the ED80 , 100 , 120 and now the 150 really shine .
My 5c .
Edited by beanerds, 18 September 2019 - 06:06 AM.