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Message: <blockquote data-quote="jrp jr" data-source="post: 3340585" data-attributes="member: 130847">Celestron Ultima 80 zoom for TSN 1 -4I have been playing with making some adapters for budget scopes to allow them to use better eyepieces. In doing this I went the other way and discovered that the Celestron zoom 8-24 for the 80mm ultima does fit and preform like a champ on my TSN-1. My scope version does not have the sealed glass window. A very thin o-ring must be placed under the Celestron's eyepiece collar as described by others for the Optiicron zoom eyepiece. This prevents the barrel of the eyepiece from rotating. The o-ring must be needle thin in order to allow for focus at the 24mm setting near and far.The field of view is typical for a zoom. The clarity is what is surprising. The 8mm focal length gives 52.5x. I see no defects or loss of clarity. Really, considering from where the eyepiece came I was stunned.  After what equates to 45x there is a slight dimming. At 52 it is slight but obvious. 40x seems to allow me to resolve the best detail. After this mark I see no increase in resolution but the view is bigger but still very clear. I think that pretty much describes any 80mm class quality non-ED/APO scope.In the past I tried the Kowa TE-9z zoom. I was not impressed and sent it back. I accept the use of this one maybe because I have accepted that almost all zoom lenses used at high power is not very pleasant with glasses on. So off they came. I was going to try the Opticron v2 but I cannot see why I should now.The only way I have been able to find this eyepiece is to actually buy the 80mm Ultima scope. I think I bought mine for $174.00. I'll be selling the Ultima scope with a modified Celestron LER adapted. The scope may be huge but it is incredible for the $. The 65mm Ultima comes with a different smaller zoom eyepiece and you do not want that one. This zoom works, good luck with it. JP</blockquote>

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