http://www.optcorp.com/vixen-flip-mi...-focusers.html
I have three of these Vixen Flip mirrors now excess to requirements.
These were modified to accept a 90/4 beamsplitter plate - ie 4% of the light reflected to the guide port and 90% allowed to pass through to the camera/ spectroscope.
I can sell them with the beamsplitter plate fitted (plus original Vixen mirror) or re-fit the original mirror to return the unit to original spec.
Before I change-over any of the units please register your interest.
I think the original Vixen packaging/ boxes may also be available.