The lunar topographic camera ( LTC ) was used on Apollo 14 and 16.
Apollo 14 Mission Photography:
Hycon Lunar Topographic Camera.This electrically operated camera,
which was carried aboard the CM, was a modified KA-7A Aerial
Reconnaissance Camera, which, when used, was mounted in the crew
access hatch window. A remote control box and interconnecting cable
provided automatic mode or strip photography or manual mode for single
frames. Variable Forward Motion Compensation (FMC) allowed for the
spacecraft orbit motion. For each frame exposed, a small clock showing
the day and time was simultaneously exposed to the side of the frame.
This photography was intended to support the objective of obtaining
high-resolution photography of future landing sites and areas of
scientific interest. A camera malfunction partway into the mission
caused the shutter to operate continually. This resulted from a
transistor failure caused by a sliver of aluminum that became lodged
and shorted the system on the shutter pulse switching circuit. Also,
the lack of a continuous pulse, which activated the focal plane
shutter, caused an intervalometer anomaly resulting in multiple
exposure of the same scene. In addition, this same region of the film
was overexposed approximately two stops.
The lunar topographic camera (LTC) malfunctioned and only 193 usable
photographs were recovered from the two rolls of 5-inch film.
Apollo 16 Photographic Equipment
In addition, photography of the moon is accomplished with the lunar
topographical camera (LTC).
From nasa spaceflight.com
NASA rebranded it "Lunar Topographic Camera" LTC. It was originally
to fly on the last three H-class missions: Apollo 13, 14 and 15. The
first got its incident, on Apollo 14 the camera failed after 200
pictures, and then Apollo 15 become a J-class with a SIM bay (and
PanCam ? can't remember).
Unlike PanCam it was mounted inside the Command Module, looking
through the hatch window. One advantage: no EVA to retrieve the film.
One issue: it was huge and took an entire astronaut seat when
The camera then flew on Skylab and was called Earth Terrain Camera.
It had pretty good performance, only slightly worse than PanCam.
Ground resolution: according to "Spie and shuttles" book, 17 m to 30 m
(55 ft to 100 ft) on Skylab. And this already made the NRO a little
Seems the infamous "Skylab Area 51 incident" happened with this camera
; not with the hand-held ones. And this probably is the reason why the NRO made a fuss about it !
Around the Moon: 15 - 25 ft from a 60 nm orbit. 3 - 5 ft if the orbit
was lowered to 8 nm (that's pretty low, even by lunar orbits standard !)
Some of the LTC photos on collect space
An example image from Apollo 14, 7216 * 6034 pixel, 124.57 MB, excellent quality.
A grand comparison of an LTC image to images by Chang'e and Kayguya/Selene:
Made by Paul of collect space.
So the LTC was used on Apollo 14 and Skylab. Use on Apollo 16 is doubtful.