I recently purchased a SW Evostar 120ED and have been trying it out. After reading some reviews, I have to say I am a bit disappointed. I live in a highly light polluted area, so I have stuck to planets and the moon so far and have only used the stock equipment (EP and diagonal). However, I read reviews that stated how low the chromatic aberration (CA) is and for instance how much detail the reviewer could see of Mars (like polar caps). I can't see any detail on Mars, using the 5mm EP (180 X), but I do see plenty of CA. I would say it takes up 5-10% of the object diameter with the red on one side and blue on the other.
I could provide pics, but I only have a cell phone adapter and phone camera to use right now. So they a pretty blurry.
On the plus side, on good nights I can see bands on Jupiter and Saturn and make out the dark band in the rings. I also tried viewing without the diagonal since I read that is is not top-notch and I did see a slight improvement in the CA.
I realize this is a fuzzy question, but am I expecting too much from this 'scope?