Picked up one of these used for white light solar with my wedge, but tonight I did try it on the moon. The contrast and resolution on the moon was exactly what I would expect out of a high quality optic with a very high level of color correction. The amount of detail on the moon was better than perhaps any other scope I have owned up to about 6". The image was free of any visible chromatic error and even on the limb, I saw no fringing.
Even though I have recommend them to others on their reputation I have not previously owned one. When they first came out, I thought it was an odd size and could not understand why they did not just go to 127mm, but the more I thought about the design the more I came to see the goodness in it. At 120mm, the FPL-53 working at f/7.5 can still work well with a doublet lens, and the doublet lens keeps the scope light enough to work acceptably well even on a moderatly good Alt-az mount (I was using an Astro-Tech Voyager and while probably at the limit for this mount, I was able to focus without inducing more than minor movement.).
The 120ED has an excellent reputation and now that I have used one first hand, I can say that my own opinion is that this reputation is well deserved. I am quite impressed. I would put this scope very high on my short list of scopes that really impressed me and at the used price, I would say that this has dethroned the Orion 100 f/9 as being my pick for the very best value in the refractor market. I see these in the $900 range (and I paid less than that) and it is a remarkable amount of telescope for that price and even at the new price, I think it is a very fair value. At the sub $900 price point though, it is just a crazy good value and even not considering the price, a rock solid performer in the sub-6" category with no scope I think I have owned in the sub-6" catagory impressing me more than this.
Why did I wait so long to get one?????
Edited by Eddgie, 05 March 2017 - 11:50 PM.