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Apollo 10 Sequence Photography (16-mm)

Apollo 10 returned 15 magazines of 16-mm cine photography using SO-368 colour film balanced for exterior lighting (CEX) and SO-168 colour film balanced for interior lighting (CIN). Eleven of the magazines contain plottable scenes of the lunar surface. Four magazines contain coverage of activity inside the spacecraft, the docking and the outside view during re-entry. Very good lunar surface detail was obtained from high and low angles, near vertical sequences as well as in many panoramic views. Most exposures were good except near subsolar when the rendition of scene was poor.

Chart 1

Apollo 10 Sequence Photography, Magazines C, D, F, G, H; 16-mm (Film width).

Click on above image for larger chart.

Chart 2

Apollo 10 Sequence Photography, Magazines I, K, L, V, W, Y; 16-mm (Film width).

Click on above image for larger chart.

16-mm Data Acquisition Camera

The Data Acquisition Camera is a modified movie camera and is an improved version of the earlier Gemini-type 16-mm sequence camera equipped with new-type external film magazines which greatly enhance the photographic capabilities. Primary use of the camera is to obtain sequential photographic data during manned flights. It is used for documentary photography of crew activity within the CM and for recording scenes exterior to the spacecraft. Bracketry installations at each rendezvous window facilitate use of the camera for CSM-LM docking photography to recording engineering data. Camera modes of operation (frame rates) are variable as follows: time, 1 frame per second (fps), 6 fps, 12 fps, and 24 fps.  Shutter speeds are independent of frame rate and include 1/60 second, 1/125 second, 1/250 second, 1/500 second and 1/1000 second.  Camera power is obtained from the spacecraft electrical system via panel-mounted 28V DC utility receptacles. Camera operation is manually controlled by an On-Off switch located on the front of the camera. Camera weight, less film magazine, is 1.8 pounds (0.8 kg). When mounted at either spacecraft rendezvous window, the camera line-of-sight is parallel (+2 degrees) to the CM X-axis. Camera accessories include a power cable, film magazines, lenses, right angle mirror, and a ring sight, which are described in the following paragraphs. The remote control cable, can also be used with the 16-mm Data Acquisition Camera.

Power Cable. The power cable provides the necessary connection between the spacecraft electrical power system and the 16-mm camera. The cable is approximately 108 inches (2.74m) long and weighs approximately 0.23 pound (0.4kg). 28-Volt DC utility receptacles are located on spacecraft panels 15, 16, and 100.

16 mm Film Magazine. Film for each mission is supplied in preloaded film magazines that may be easily installed and/or removed from the camera by a gloved crew member. Film capacity is 130 feet (40 metres) of thin base film. Total weight of magazine with film is approximately one pound (0.4kg). Magazine run-time versus frame rate is from 87 minutes at one fps to 3.6 minutes at 24 fps. Each magazine has a film-remaining indicator plus an end-of-film red indicator light. Future plans include film magazines of 400-foot capacity. Quantity and type of film supplied is determined by mission requirements.

Lenses. Three lenses of different focal length are provided for use on the 16-mm camera.

16-mm Camera Operation. The camera mount (grip) is removed from stowage and attached to the dovetail at the appropriate rendezvous window. The 16-mm camera and accessories are unstowed as required. The selected lens is attached. An optional right-angle mirror may be installed on the lens. A ring sight may also be installed on the camera for hand-held use. A film magazine is installed on camera. The correct exposure is determined. The lens aperture and focus are set. The camera mode (frame rate) and shutter speed are set. The power cable is installed on camera. If required, the camera is installed in the mount at the window. The Utility Power receptacle switch is set to Off, the camera power cable is connected to the appropriate receptacle and the Utility Switch is placed to the Power position. Filming operation can be started by pressing the Operate button (switch) on the front of the camera. To stop the camera, the Operate button is pressed again.

[Above details from the Apollo 16 Flight Journal.]

Last updated: 2018-06-04

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