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camera_help [2018/07/07 12:37] – [file_man.mo] walter_schulzcamera_help [2018/11/08 23:11] – [Intervalometer] walter_schulz
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 **Raw zebra underexposure** **Raw zebra underexposure**
  
-You may adjust thresholds for underexposure and overexposureor you can +  * OFF - 0EV <> +4EV 
-disable zebras while recordingNotewhen using the Technicolor + 
-CineStyle picture styleluma will have values between 16 and 255; +This allows you to choose at what exposure the underexposure zebras will be displayed.  0 EV means that the zebras will be displayed where the amount of noise in the imageis equal to the amount of signal in the image (the noise floor).  
-therefore, you will have to set the underexposure threshold to 16 or +A general consensus among photographers, is that the limit for acceptable amount of noise in images, is 2 EV above this noise floor. 
-greater.+ 
 +**NOTE:** 
 + 
 +Dual ISO zebras:  When using dual ISO, there are dual exposures and the zebras reflect this.  With dual ISO there are two types of zebras.  
 +  * Full/solid zebras which work exactly like normal zebras, and describe overexposure in both ISOs.  
 +  * Half/stripe zebras which represent overexposure only in the higher ISO.
  
  
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 //Submenu options:// //Submenu options://
  
-**Take a pic every** Duration between two shots. +**Take a pic every** Duration between two shots. More precise: Time between 2 "shutter button actuations". If duration is set to lowest setting (0s/like crazy) cam will take pics in burst mode.
 Caveats: Caveats:
-If duration is exceeded by exposure time next pic will be taken immediately. +If selected duration is longer than exposure time next pic will be taken immediately after last pic
-Option "Long exp. noise reduction will double exposure time by running "dark frame" pic if condition is met.+Option "Long exp. noise reduction will result in exposure time doubled if condition is met.
 If Intervalometer is used to trigger "Full Resolution Silent Pic" camera will take a few seconds for processing FRSP.  If Intervalometer is used to trigger "Full Resolution Silent Pic" camera will take a few seconds for processing FRSP. 
 +Don't expect "like crazy" (burst mode) to run without hickups. Cam has to wait for free buffer to continue shooting. Same may be happen with low duration settings in combination with high date rates (RAW) and/or cards with low write rate.
  
 > Internal note: ML menu shows (bottom line) calculation for time lapse duration depending on number of pics and interval. No idea how to represent this. > Internal note: ML menu shows (bottom line) calculation for time lapse duration depending on number of pics and interval. No idea how to represent this.
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 You can stop the intervalometer by rotating the mode dial, by pressing MENU You can stop the intervalometer by rotating the mode dial, by pressing MENU
-or PLAY, or by turning off the camera. To avoid flicker, shoot in+or PLAY, or by turning off the camera. To avoid aperture flicker, shoot in
 manual mode, use manual white balance, avoid short exposure times and manual mode, use manual white balance, avoid short exposure times and
 use a manual lens (if you use an EF lens, lock the aperture and unscrew use a manual lens (if you use an EF lens, lock the aperture and unscrew
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     * Best Focus     * Best Focus
     * Slit-Scan:      * Slit-Scan: 
-    * Full-res:+    * Full-res: Silent pic covering full sensor area. 
 +Limits:  
 +FRSP is not made for short exposures. You will get overexposured pictures if you insist on using short shutter settings. 
 +If you use minumum exposure time (1/4000 or 1/8000) you will get a gradient. (Example: 5D3 gets 1/33.19 at the frame's top and 1/6.30 at the bottom). 
 +500D, 550D and 600D are limited to exposure times up to 0.8 seconds. Other cams can do 15 seconds. 
 +Tips: 
 +You have to enable Expo Override to change aperture. Or use manual lenses. 
 +ETTR works best with Intervalometer. Set ETTR option "Always On". Adjust aperture or use ND filter to get exposure times above 0.5 seconds. Otherwise results may be impossible to deflicker in postprocessing. Don't forget Silent pic and Intervalometer are using the same default trigger. Change Intervalometer trigger to "Leave menu" to avoid this. 
 +Source: https://www.magiclantern.fm/forum/index.php?topic=12523.msg143510#msg143510 
 + 
  
 > OBSOLETE? Silent Pic Hi-Res: > OBSOLETE? Silent Pic Hi-Res:
camera_help.txt · Last modified: 2023/01/24 05:08 by Walter Schulz