Well made adapter
Haven't used this adapter 49mm to 48mm adapter yet but it well made. Baader has a huge selection adapters from your SCT visual back to daigonal and diagonal to eyepiece or camera.
Baader T-Adaptor and T-Ring for Baader Hyperion Eyepieces
These items are of high quality and relatively inexpensive - definitely worth the price if you already own Hyperion eyepieces and are interested in either A-Focal or classical eyepiece projection for astro-photography. I am unaware of any other eyepiece system that adapts so easily for eyepiece projection in quite this manner.