Footage taken through a Star-Tron MK-428 fitted with an ITT F4845 25mm Image Intensifier and a Star-Tron MK-880 fitted with an ITT F9800K 18mm Image Intensifier.
The annotations embedded in the video are wrong, the F4845 type is a standard 25mm glass input Gen 3 tube of the double proximity focused type with a FO inverter. The F4845 type is not a 3+1 hybrid nor a super inverter.
The ITT type designation for the 25mm 3+1 super inverter is F4844 in which a 25mm glass input Gen 3 module (double proximity focused) is bonded to a Gen 1 ESI tube ( Electrostatic Inverter).
The following videos include footage through an ITT F4844:
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Star-Tron Night Vision
Star-Tron Night Vision Scope
Star-Tron MK-428
Star-Tron MK-429
Star-Tron MK-880
Star-Tron LR-170
Star-Tron LR-300
Star-Tron LR-410
Star-Tron MK-600
Night Vision Scope Documentary
Documenting Night Vision Scope
UFO
Night Vision UFO