Guest CodnorPaul Posted February 20, 2013 Share Posted February 20, 2013 My Hyperion Zoom is not parfocal but I believe they should be - I am sure it was when I got it, but now it goes out of focus when moving through the zoom. Has anyone got any idea? The bottom ring is loose so it spins - is this correct? Link to comment Share on other sites More sharing options...
Daz Type-R Posted February 20, 2013 Share Posted February 20, 2013 If it is the mkIII then the websites says it is but it isn't (dont know how they get away with that) I have allways had to re-focus once adjusting the mag. Link to comment Share on other sites More sharing options...
Guest CodnorPaul Posted February 20, 2013 Share Posted February 20, 2013 Right - thanks, it is the MkIII - thought I had a problem with it! Link to comment Share on other sites More sharing options...
Daz Type-R Posted February 20, 2013 Share Posted February 20, 2013 I know a few people in the past have said the same thing, that the sites say it is parfocal but it isn't. Either that or mine has been broke from new - lol. Link to comment Share on other sites More sharing options...
+RonC Posted February 21, 2013 Share Posted February 21, 2013 Mine's the same, just need a tweek when changing 8-24 too! Link to comment Share on other sites More sharing options...
Guest Ely Ellis Posted February 22, 2013 Share Posted February 22, 2013 Hi, That is one of the things that lets it down. It is FAR from para-focal. Although the first few stops from 24mm are OK, when down to 8mm it is a long way out. For this reason, I am starting to prefer individual EP's, as most of the ones I have, I can just drop in with virtually no re-focus. Nothing wrong with the optics though, just not as convenient as I hoped. Cheers Martin Link to comment Share on other sites More sharing options...
Doc Posted February 22, 2013 Share Posted February 22, 2013 Having used many brands of eyepieces I don't think I've ever seen a true parfocal eyepiece, they all need a little tweaking. Link to comment Share on other sites More sharing options...
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