User manual ARRI ALEXA

[. . . ] User Manual ARRI ALEXA For ALEXA Software Update Packet 2. 1 Printed on 29 November, 2010 All rights reserved. This document is provided under a license agreement containing restrictions on use and disclosure and is also protected by copyright law. Due to continued product development this information may change without notice. The information and intellectual property contained herein is confidential between ARRI and the client and remains the exclusive property of ARRI. [. . . ] The HD-SDI format should match the recorder's setting · If the desired sensor frame rate is a standard speed, set "Link sensor fps" to "On". This way, the sensor always follows the REC OUT frame rate, avoiding dropped or duplicate frames. · When the REC OUT settings are done, press BACK to load the Sensor Fps screen. · In the Sensor Fps screen, decide if the MON OUT frame rate is OK. If the sensor frame rate exceeds the available MON OUT frame rates, set the MON OUT to half the sensor frame rate if possible. · When the MON OUT settings are done, press the BACK button to load the Sensor fps screen. · Choose the desired sensor fps value from the list and press the jogwheel. · If the desired value is not available, press the ADD screen button to set the desired value and add it to the list by pressing the jogwheel. · All frame rate settings should be correct now. 11. 1. 4. 3 SHUTTER Pressing the SHUTTER screen button in the HOMESCREEN opens the SHUTTER list screen. The list contains default shutter angles 11. 2, 22. 5, 45. 0, 90. 0, 172. 8, 180. 0, 270. 0 and 358. 0. Note: Access to this screen is disabled during record. 62 Camera ControlsMain Controls Figure 43: Shutter list To add a new entry to the list, press the ADD button. With the screen buttons the value can be in- or decreased in bigger steps. First set the integer value with the jogwheel, clicking it will start edit on the fractional part. Note: A maximum of 16 entries is supported by the list. After reaching this number of entries, it is no longer possible to add entries without deleting others first. Figure 44: Add Shutter angle Camera Controls Main Controls 63 Press the DELETE button to delete list entries. Deletion must be confirmed by pressing the two lower screen buttons simultaneously. After deletion, the SHUTTER list screen is loaded, and a new value must be selected. Note: Default values cannot be deleted. Figure 45: Shutter list delete screen 11. 1. 4. 4 EI The Exposure Index is the applied sensitivity of the camera. Note: The Exposure Index list has a fixed content, meaning that it cannot be changed by the user. ALEXA has a basic sensitivity of 800 ASA. This means that the dynamic range is evenly distributed above and below neutral grey with very low noise in the blacks and a very screen clipping behavior in the whites. Due to its high dynamic range, the sensitivity can be set in a range from 160-1600 ASA in steps of 1/3 stops while keeping a high image quality. Applying the extreme ASA ratings will nonetheless have an influence on the images. At low ASA ratings like 160 ASA, the dynamic range below neutral grey gets bigger, which will reduce noise even further. At the same time, the dynamic range above neutral grey is slightly reduced. The clipping itself is not influenced by this, but the shoulder of the gamma curve will get slightly steeper, which will reduce the smoothness of the clipping. 64 Camera ControlsMain Controls At high ASA ratings like 1600 ASA, the images behave the opposite way. Noise is increased, which makes it important to judge the dark parts of the image, while the clipping behavior will be even smoother. Figure 46: Exposure Index screen 11. 1. 4. 5 WB White Balance adjusts the color balance of the camera according to the lighting in use. [. . . ] 43 V Viewfinder Cables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 V-Lock Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 P Parallel recording . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91 Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]