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Message: <blockquote data-quote="Smithhill" data-source="post: 1835411" data-attributes="member: 57837">I do not know much about other eyepieces, but I would guess the vignetting would be close as long as the eyepiece specs are close.   The Hyperions are listed as 20mm eye relief, and have an eye lens of about 33mm dia.   Of course these figures do not seem to be accurately reported by different manufacturers.   For example, I believe the reported eye relief from a Swaro 30X is about 18.5 mm.   It seems that no zoom eyepiece is as good as the fixed in  a series, so they should be avoided.The important thing is to try and measure a hand held distance before adapters are made or if possible, before equipment is purchased.  The optimal position needs to be found.  The LX3 has been largely written off because people have not made provision for bringing the camera to 20% zoom before positioning the eyepiece.  The camera can be set to stay in the on position.   There is no problem when it is turned off, but it cannot be restarted again without the lens extending fully and causing a fault if the eyepiece is present.There are two diameters of filter adapters sold.  I use the smaller diameter one that is a straight cylinder with 46 diameter threads.  It was shortened 8mm.   So, if you find any additional information please forward it.   Thanks.      Gene</blockquote>