Aaton Cam 35III Users Guide
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71 SUPER35 USER 35 US 23/1 -2 1/20/98 19:46 Page 71
3-PERF FORMAT 73 7 USER 35 US 23/1 -2 1/20/98 19:46 Page 73
7.1 CONCEPT The only thing we know about tomorrowÕs high definition TV is its aspect ratio of 16/9 (1.78). This new ratio is now taking the place of the 1.85 (USA) and 1.66 (Europe) ratios. This is why it is time to re-examine the MoscowÕs idea (1962) of the 3-Perf format. As a matter of fact, an image with the 1.78 ratio, with its both edges close to the 35mm film perforations, is a little higher than 3 perfo- rations high. Why should we keep a huge amount of unused emul- sion between two images (i.e. why should we keep filming in 35mm 4-perf )? 35mm standard 35mm 3-Perf 3-Perf presents three main advantages: ¥Saves 25% on raw stock. ¥Increases magazine running time (a 400Õ roll increase from 4 1/2 to 6 minutes). ¥Allows for the camera to run quieter. 7.2 THE AATON 35-III 3-PERF CAMERA BODY A 3-Perf camera body is available. This is a special AATON 35-III, 74 USER 35 US 23/1 -2 1/20/98 19:46 Page 74
with the sames viewing system, magazines, and lens as on a standard AATON 35-III (4-Perf ). For one who already owns a AATON 35- III, it is only required to buy a 35-III 3-Perf camera body, because he can use the magazines, viewing systems, batteries, and so on whi- ch was aquired for his standard 35-III. 75 3-PERF FORMAT USER 35 US 23/1 -2 1/20/98 19:46 Page 75
AATONCODE 77 8 USER 35 US 23/1 -2 1/20/98 19:46 Page 77
8.1 CONCEPT AatonCode, AatonÕs proprietary in-camera timecode system, is recor- ded in the AATON 35-III on the edge of the film between the per- forations in both matrix and man-readable form. As recorded in the camera, a six digit production ID, a SMPTE-compatible real time address (full date and time), an equipment ID and the running speed of the body. TimeCode is exposed onto the film by means of seven micro-diodes, which flash rapidly to form the code as the film rolls through the gate. The intensity of the diodes is adjusted to the filmÕs sensitivity by means of the cameraÕs ASA selection. The AATON 35-III can accept timecode information in both ASCII and SMPTE form, and work with all standard timecode devices. Beacuse the same time address is running in both the came- ra and the sound recorder, a slate is no longer needed for syncing purposes; synchronization becomes fully automatic during the film/tape transfer or later post-production stages. An Aaton device called Keylink, which consist of CCD reader heads and a PC, and which is owned by the telecine house, is designed to read Keycode and AatonCode off the film during transfer and corre- late this to the continuous video timecode and all other transfer data entry for storage on its hard drive. Keylink can also ingest scene/take information and notes from the set recorded by means of AatonÕs ScriptLink software. The facility can then supply all correlated information in VITC (vertical interval timecode) and/or burn-in windows on the transfer- red tape, and also on floppy disk for direct use with non linear edi- ting systems, audio workstations and logging programs. 8.2 THE INTERNAL CLOCK The AATON 35-III contains an internal clock designed to be initia- lized from an outside source and keep accurate time (within a half a 78 USER 35 US 23/1 -2 1/20/98 19:46 Page 78
frame) for 8 hours. The camera is equipped with an instantly charged supercapacitor buffer that is designed to keep time between battery changes. Keep in mind that a battery which is too low to run the camera has enough energy to drive internal clock for hours. Get into the habit of leaving an exhausted battery on-board the camera until you have a fresh battery close by. The supercapacitor allows a full minute for battery replacement before timecode is lost. 8.3 ORIGINCPLUS MASTERCLOCK For the most efficient and foolproof means of working with Aaton- Code, it is highly recommended that an Aaton device called Ori- ginCplusis used. OriginCplus can be quickly programmed with a production ID, full date and time of day, then initialize timecode devices in either ASCII or SMPTE form. OriginCplusis TCXO- controlled and will run for 150 hours with an internal 9V lithium cell; it is designed to be left on during the shoot day and used as a comparator to monitor timecode drift between devices. OriginCpluscan also be used as a SMPTE generator to supply accu- rate timecode for slates and inserters, or to record timecode on one audio channel of a non timecode audio recorder. 8.4 INITIALIZING AATONCODE IN THE CAMERA There are two ways in which AatonCode can be initialized in the AATON 35-III camera. The preferred method is by means of the Ori- ginCplus, which inputs timecode in ASCII form. It is also possible for the camera to receive information in SMPTE from directly from a SMPTE timecode device such as an TC audio recorder. Both methods are detailed below. 79 AATON CODE USER 35 US 23/1 -2 1/20/98 19:46 Page 79
8.4.1 Using the OriginCplus - Recommended Method ¥Program the OriginCplus by inputting Prod ID, accurate date and time of day. Press the # key to scroll through each field; after all fields are set as desired, press * to start the clock. ¥Make sure the camera has a battery attached. ¥Plug the Lemo5 cable of the OriginCplus into the Lemo5 chassis mount on the base of the camera. ¥Press * on the OriginCplus to send the timecode information. The OriginCplus will display Good OO.O after the timecode has been accepted in the camera. The control panel of the AATON 35-III will display hours/minutes/seconds when the button marked Time is pressed. Toggling this button will also display year/month/day, then the production ID, then the equipment #. ¥Make sure to adjust the ASA selection to the exposure index of the film stock being used. ¥Disconnect the OriginCplus from the body and proceed to the next device. 8.4.2 Using an External SMPTE Device ¥Make sure the AATON 35-III has a battery attached and is not running. ¥Choose the SMPTE timecode device that will be supplying the timecode (such as a Fostex PD2 or a Nagra IVS-TC). Set the time of day and date, and set its clock to free run mode. ¥Connect a cable from the SMPTE output of the timecode device to the Lemo5 chassis mount on the base of the camera. ¥Set the on/off switch on the camera to run or test position, then off again; this will send the timecode information to the camera body. The AATON 35-III will display hours/minutes/seconds when the button marked Time is pressed. Toggling this button will also display year/month/day and the equipment #. No production ID will be recorded. ¥Disconnect the cable from the body and proceed to the next devi- ce. 8.5 MONITORING AND MAINTAINING 80 USER 35 US 23/1 -2 1/20/98 19:46 Page 80