Here we have the special Televu adaptor, which is attached to the Nikon

UR-E6 telephoto lens adaptor, the 3 set screws maintain a centred lens to

lens capability and also prevent light emitting between the two lenses.

Please note: I measured the distance from the bottom rim of the UE-R6 to

the lens glass of the Nikon telephoto lens and compared it with the distance

to the Bausch & Lomb eyepiece lens and surprisingly only .07mm difference

making focusing through the camera LCD a great success and I don't have to

remove the camera from the assembly in order to focus to whatever I am doing.