https://www.firstlightoptics.com/reducersflatteners/celestron-f63-focal-reducer.html
Well I have now used the scope with the focal reducer in place. ?
Whilst it is billed as mainly to improve imaging, it certainly seems to improve visually too. I will have to experiment further, because I first used the scope on a moonless night at F10, last night with the focal reducer in place, F6.3, there was a full moon, which made things a littler more interesting! Certainly the view of M31 was wider and seemed sharper, but that may have been my imagination. I am sure I saw more detail, which is surprising considering the full moon, I suppose it may have been just me, if I am being negative, but it did seem better.
It really does make a two scopes for one in my opinion alone, not least because it makes it easier for lower magnifications. The 40mm eyepiece at F10 gives a Magnification of 58.75, at F6.3 it is 37, I think, even though they advise not to use an eyepiece longer than 35mm at 6.3! Never mind, with several eyepieces it seems to have improved things.
Considering the thing cost £99, it seems to be a good buy, especially when you consider that I spent £2349 on my scope. Even more so considering the future benefits when I dip my toes into imaging... As well as it also gives a flatter field.
I can heartily recommend it for those with a similar scope, even if like me it is only for visual versatility. ?
My first impressions of the Nexstar 9.25 Evolution can be found here: