Hedtjarn

Sorry for digging this old thread up. Just about to lay my hands on the skyguider pro where I will mount my canon gear. As I undestand the L-enhance can be found as a dslr clip-in filter. But what about the L-extreme? Only seems to find it as a regular 1.25" or 2" filter. You guys who use it with your dslr, are you using canon ef-lenses or other optics? If you are using ef-lenses, how and where do you stick the filter? :S