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Message: <blockquote data-quote="DRodrigues" data-source="post: 1423531" data-attributes="member: 55152">bird binoviewing with Schmidt CassegrainJust to add some info: - the great increase of power in the set I tested with the C5 was not due to the telescope system but due to the Vixen erector lens. I found that it's parfocal using just the eyepiece and doesn't increase magnifications. If the distance increases between the image erector and the eyepiece, it increases magnifications in a direct way. The problem is that binoviewers have an extra 10 to 12 cm between the image erector and the eyepieces...Meanwhile I found another way of erecting the image with the binoviewers (straight way and compact format), but still have to confirm in field if it works well. However it doesn't work with the PMW and would need to use 2 zoom eyepieces...David</blockquote>