Ken; The one I had was used in my C 11, but it still was a mediocre eyepiece at best. I saw the outer 20% of the field of view was noticeably brighter than the main central field. I don't know if it was a poorly blackened edge of the eyepiece or just a poor design. Either way, I sold it off rather quickly and have since heard from several other people that this defect in the Stratus is obvious in many of these eyepieces. The good news is that the Ethos buying spree has released lots of Panoptic 22mm eyepieces and other Televues on the used market. Hope that helps; Steve Coe > Has anyone had any experience with the Stratus 21 or 24 mm eyepiece that > Orion carries ? Particularly in a f/4.5 system ? > Merry Christmas to all > > > Ken Sikes > -- > See message header for info on list archives or unsubscribing, and please > send personal replies to the author, not the list. > > -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.