The free aperture of this Amici is larger than that of many smaller Amici prisms which are included with some telescopes, so there is less vignetting with eyepieces with longer focal lengths, but both the C5 and the Amici have only got a free diameter of 26-27mm, so there will be some vignetting with most 2" eyepieces.
It is not possible to replace the eyepiece clamp with a Clicklock.
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|Optical Design||Erecting Prism|
|Inner Connection (lens sided)||Thread, 2" (50,8mm)|
|Inner Connection (eyepiece/-camera-sided)||Clamp, 1¼", 2" (50,8mm)|
|Reflection surface||Total reflection|
|Image Orientation||Erect image, Non-reversed|
|Optical length (mm)||121mm with 2" barrel; with 1,25"-reducer additional 10mm|
|Clamping System||Dovetail clamp|
|Inner Diameter / Clear Aperture (mm)||26|