If you have a visual back, [urlhttp://www.opticsplanet.net/meade-eyepiece-holder.html]07182[/url], you can add a standard 1.25" refractor style erecting prism, such as the Meade 928. Bad idea, though. Erecting prisms degrade image quality compared to a mirror diagonal. What little you gain in comfort is not worth the loss of image quality. The diagonal will still give upright, though reversed right to left images. _________________ Thanks for posting with us
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