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Some eyepieces' undercut can interfere with the Tak 1.25" prism's twist clamp. If that happens lifting the eyepiece out a few mm will solve this, and the twist lock will hold the eyepiece firmly without the need to apply much force.
In spite of this I prefer the Tak prism to the very good Intes (or any other) mirror diagonal for double-stars and planets, there is visibly less scatter and more clarity at high magnification in high contrast scenes (like when splitting very uneven doubles). That's in my f/12 Maksutov, of course.
Cheers
Steffen.
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