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BOOTDISKflag set in the camera (which the installer does), and you do not have an
AUTOEXEC.BINfile on the card the camera WILL NOT BOOT! It will hang and not wake up until the battery is removed.
locked upcamera, quickly remove the battery.
Most cameras have a dedicated movie mode on the mode dial. In this case, it's obvious what movie mode is.
However, the following cameras do not have a dedicated movie mode. For these cameras, Magic Lantern considers the following configurations as
When movie mode is active, Magic Lantern will show a
Mv symbol on the bottom info bar.
Most cameras have a button labeled as
[Q]. A few cameras don't, so you will have to use some other button:
Magic Lantern uses the available screen space to display operational information in a clear and practical manner. The image shows a screenshot with commonly used ML features enabled.
Some items that may need more details:
Picture Style(5D Mark II): show exposure tools (zebra, false color, histogram, waveform, spotmeter) and cropmarks (as configured from Overlay menu).
Main Dial (Scrollwheel)in
PLAYmode: customizable function (preview HDR images, silent pictures, multiple exposures, timelapse playback, image comparison). See SET+MainDial.
LV: create a transparent overlay from current image (when Ghost Image is active). You can use it for panoramas or for repeating shots.
LVon 60D/600D: you can configure it to protect images with a single button press.
SET+Erase: you can configure it to erase images without the confirmation dialog.
Zoom In: quick image magnification: a single click can zoom all the way in, on center point, on AF point etc (configurable).
Arrow keys can be used to quickly adjust the following settings:
To enable the shortcut menu, press the following key:
Avbutton (optional: cover the LCD sensor);
Meteringbutton (near ISO);
Besides the shortcuts, arrow keys can also be used for focusing (see Follow Focus).
See also our Shortcuts article.
SETpressed at startup: loads vanilla firmware (does not load Magic Lantern).
INFO/DISPin LiveView: change current display preset, if this feature is enabled.
Zoom Inwhile recording: it does just that :) (Magic Zoom)
SETin LiveView: center AF area (the little rectangle).
ERASEbutton to bring up the Magic Lantern menu.
PLAYto toggle values.
Qto open a submenu with more settings.
DISPbutton to get help.
Zoom Into preview the image behind ML menu.
MENUto hide items that you don't use (to reduce clutter).
For cameras without
One-handed menu navigation for 5D Mark II and 50D (optional):
Manual audio controls.
This menu is not available on Canon 600D / T3i.
The 600D/T3i already has manual audio control, but right now it's not possible to change audio settings from Magic Lantern. You can only use audio meters during recording.
Audio tests by Ryan Sauvé Audio_Conclusions
Gain applied to both inputs in the analog domain. If you use an external preamp, set this parameter as low as possible; otherwise, set it as high as possible without clipping (audio meters should be green).
Digital gain applied to left and right channel. Recommended setting: 0.
Audio input source for recording:
Balanced audio allows for very long cable runs without interference. Usually balanced mics have three pin XLR connectors and it is very easy to out together an XLR to Canon mic input cable. Balanced allows us to use such pro mics with our little Canons and this is a very welcome surprise for audio guys. (source)
Digital high-pass filter. See AK4646 datasheet p.34.
ON: input impedance is 2 kOhm;
OFF: input impedance is 30 kOhm.
This setting is always
ON when input source is either
internal mic or
Enable/disable Automatic Gain Control. AGC is applied only in digital domain (i.e. it overrides digital gains, but you can still adjust analog gain).
Recommended setting: OFF.
Audio monitoring tutorial
Audio monitoring with headphones, using the A/V cable.
Disable this setting if you are using a SD monitor!
This feature is not available on 600D/T3i.
To use audio monitoring, you need a special cable:
Warning: mobile phone cables will not work; even if the connector looks similar, it's not identical. You must use the original cable which came with your camera.
For details, see Audio monitoring HOWTO on Vimeo group.
Digital output gain for audio monitoring. It does not have any effect on the internal camera speaker.
Display the input audio level, from -40dB to 0dB; meters become yellow at -12 dB and red at -3 dB.
Audio meters are only displayed in movie mode.
Adjusting the exposure parameters. Most of these settings only work in Manual (photo and video), and some of them work in P, Av and Tv too.
Advanced white balance control. The preferred method is Kelvin white balance (range: 1500…15000K).
Advanced ISO control.
Fine-tune shutter speed.
Adjust aperture. When exposure override is enabled, you can adjust it in 1/8-stop increments.
Change picture style or adjust its parameters.
You can use a different picture style when recording (toggled automagically). May be useful with flat picture styles.
This mode bypasses Canon exposure limitations (for ISO, Tv, Av). It enables:
Side effect: in photo mode, anything slower than 1/25 seconds will be underexposed in LiveView.
Selects or displays LiveView display type:
Graphics overlays that can be used in LiveView or in image review mode: histogram, zebras, cropmarks, spotmeter, focus peaking, false color…
Choose when to enable Magic Lantern overlay graphics: (zebra, cropmarks, histograms, audio meters, ML shooting info…):
If you used display presets, press Q on this item to switch the presets while you are in ML menu.
Automatic Exposure to the Right (ETTR or AETTR) is a technique of setting the exposure of a scene such that few or no pixels are are over exposed (blown out) thus maximizing the information captured without loosing information to over-exposure. This may produce a darker image but this can be corrected later in post processing. The exposure curve is thus as far to the right as possible without it being clipped.
For more information on ETTR, see the page Auto Exposure to the Right.
Enable/disable zebra stripes, which indicate overexposed or underexposed areas.
Luma: zebras are computed from Y channel only.
RGB: check overexposure for each RGB channel. Clipped channels are displayed in the opposite color (i.e. clipped red shown as cyan, underexposed as white and so on).
You may adjust thresholds for underexposure and overexposure, or you can disable zebras while recording.
Note: when using the Technicolor CineStyle picture style, luma will have values between 16 and 255; therefore, you will have to set the underexposure threshold to 16 or greater.
Focus Peaking demo
Focus assist function. High-contrast lines will be marked by blinking dots showing which part of the image is in focus.
D1xy: computes first image derivative on X and Y and takes the max value. May work better in low light or on noisy sensors.
D2xy: approximates second image derivative with a 3×3 Laplacian kernel. May be more accurate in good light.
Threshold: how many pixels are considered in focus (percentage).
Color: either fixed color, or a color coding according to focus intensity.
Grayscale img: if enabled, LiveView will displayed as grayscale (but still recorded as color).
To see how it works, check this article from Luminous Landscape.
Magic Zoom demo
Displays a zoom box for focus assist. Can be used while recording.
Trigger modes (not all modes are available on all cameras):
HalfShutter: triggered when you press the shutter button halfway.
Focus Ring: triggered by turning the focus ring.
Zoom.REC: triggered by pressing
Zoom Inbutton while recording. If your camera has a LCD sensor, you may also cover it and press
FocusR+HalfS: triggered by turning the focus ring, or by pressing shutter halfway.
Focus+ZREC: triggered by turning the focus ring, or by pressing
Zoom Inwhile recording.
Zoom In (*): triggered by
Zoom Inbutton (overrides Canon's default zoom modes). To bypass magic zoom, press both zoom buttons at the same time or cover the LCD sensor.
Always On: no trigger key needed. You can use both Canon's 5x/10x zoom and Magic Zoom.
When ML believes you have achieved perfect focus, Magic Zoom will display a focus confirmation (customizable):
Split Screen: when the image is out of focus, the zoom box looks like a split focusing screen from old film cameras.
Split Screen with ZeroCross: will reverse the split direction whenever you achieve perfect focus.
Other parameters: size, position, magnification.
Original implementation: Magic Circles by AJ.
Cropmarks or custom grids for framing and composition.
ML/CROPMKSfolder on your SD card and give them short 8.3 names. You can place at most 9 cropmarks on the card.
Shows a transparent overlay which can be created from any image in Play mode.
SETor joystick press.
Preview the rectified (defished) image from Samyang 8mm fisheye lens, using rectilinear projection.
This feature works best in photo mode (outside LiveView).
Defishing uses a pre-computed look-up table (LUT). It is possible to create LUT files for any other lens or projection by defishing
vram/xy.png with your favorite defishing software, and then running
vram/defish-lut.m to get the LUT file. All the required files are found in the ML source tree. Project files (
*.PTO) for nona (hugin) are provided for both rectilinear and Panini projections.
Measure brightness from a small spot in the frame.
Possible measurement units:
This is a tool for evaluating the exposure. It shows different luma (Y) levels using a color map. You may select one of the following color maps:
Using The Video Histogram To Keep Detail in the Highlights
These exposure tools will show the distribution of image brightness levels.
This tool shows the color distribution with an U-V plot. Useful for color grading.
To learn how to read it, see Introducing Color Scopes: The Vectorscope.
Functions specific to movie mode.
Controls H.264 bitrate used for video recording.
CBR: constant bitrate. You specify a factor for multiplying default video bitrate, between 0.1x and 3x. CBR 1x is the firmware default setting.
QScale: constant quality, variable bitrate (VBR). Available values: -16 … +16. Lower numbers mean higher bitrates.
Firmware default: completely disable bitrate control.
BuffWarnLevelsetting to customize this.
When recording a movie, ML will display a small time counter in the upper right corner, which can be:
Elapsed: duration of the current clip
Remain.Card: estimated amount of recording time remaining on the card.
Remain.4GB: estimated amount of recording time until reaching 4GB (or until filling the card, whichever comes first).
Unlike Canon's timer which assumes constant bitrate, ML timer assumes variable bitrate and works even if QScale is enabled. However, due to variations in bitrate, the estimated value will fluctuate a lot, and this is normal.
If this setting is
ON, Magic Lantern will write out a metadata file for the each movie to
MVI_1234.LOG (numbered after the movie). The log file contains lens and exposure info, as well as a timestamp every time any of the parameters is changed during recording.
Log files are placed in the same folder as the movies:
Tip: you can rename
LOG files to
CSV and import them in MS Excel.
While this setting is on, movie recording will restart automatically, unless you stop it. There will be a few seconds skipped during restarting.
Custom notifications for recording or standby:
This option enables you to start/stop movie recording by half-pressing the shutter button.
Tip: with this, you can use a wired remote to start/stop recording.
Force LiveView in Movie mode (bypass the dialog saying Press LV button to activate movie shooting).
This option locks the shutter value in movie mode (you will be able to change it only from ML menu).
This setting alters FPS for all video modes. Only undercranking works well.
FPS is changed by altering two timer values (let's call them Timer A and Timer B). Increasing any of these values results in lower FPS. Aside from FPS, changing these timers may alter shutter speed and rolling shutter.
Notes and tips:
roundedto be an exact multiple of PAL/NTSC frame rates.
Magic Lantern HDR Video
This feature allows you to shoot a high dynamic range video by alternating ISO every other frame. Select the two ISO values from the submenu.
Possible postprocessing workflows:
Custom image effects found by investigating DIGIC registers:
Enable movie recording on 50D (1920×1080, 30fps, without sound). To start recording, go to LiveView (P/Tv/Av/M) and press SET.
WARNING: Canon 50D was NOT designed to record movies. Keep in mind:
This setting remains active even if you start the camera with standard firmware (until you clear your settings).
Leave unchanged: obvious :)
Block during REC: blocks the shutter and related (AF,
*) buttons while recording. In 50D, taking pictures while recording would result in ERR99; with this option, you can avoid taking pictures while recording by mistake. Side effect: this will disable image stabilization during recording.
Hold during REC (IS): ML will keep the shutter button pressed half-way during recording, which will enable image stabilization (IS). Side effect: you need to press the shutter button half way to turn IS off before the camera will let you stop recording.
Locks the exposure in movie mode. You can also use the
* button (you don't have to hold it pressed).
Functions for stills shooting (some of them work for movies, too).
Exposure bracketing for HDR images and timelapses.
Mmode, this function does shutter and/or ISO bracketing. In the other modes it does exposure compensation bracketing.
Take pictures or movies at fixed intervals.
You can stop the intervalometer by rotating the mode dial, by pressing
PLAY, or by turning off the camera.
Settings (in submenu):
noisymode, your shutter will wear twice as fast than outside LiveView.
crazymode), turn the camera off or open the card door.
INFOto turn the display off.
Bulb Ramping allows the capture of a timelapse that gradually changes exposure, compensating for the transition from day to night.
Settings for auto ramping:
Quick start guide for auto ramping:
1. Take a picture of your scene. You will use it to say:
I want my timelapse to be exposed like this picture.
2. Enable Bulb Ramping and Intervalometer.
3. Leave the camera still while ML runs a calibration step:
4. Now you will have to say what tone range to meter for (i.e. highlights, midtones…). Follow the wizard:
5. Sit back and relax :)
Very long exposures with Bulb mode and ML timer. This feature is useful for night shots and astrophotography.
Bulb timer is started by holdin the shutter pressed halfway for one second, or by remote triggers / intervalometer.
Tip: you can cancel the exposure earlier by half-pressing the shutter button.
Start/stop remote shutter release mode with the LCD sensor.
This feature is useful for avoiding camera shake.
In Movie mode, the
Wave 〰 setting is able to start and stop recording movies. The other modes can only start recording (because it's too easy to stop recording by mistake).
While recording, the
Away modes can trigger the rack focus operation.
Start/stop remote audio trigger. To take a picture (or start recording a movie), make some loud noise, for example, clap your hands or pop a balloon.
Tip: with the audio trigger you can sync a video recorded without sound with an external audio track (see this topic)
Be careful: this may trigger the shutter from the sounds made by camera (like focus beep or noise from operating the buttons).
Motion detection in LiveView.
Exposure change: it only reacts to brightness changes. Detects large moving subjects which cause significant change in exposure.
Frame difference: it computes the difference between last two frames A and B (luma channel only); this detects smaller movements which do not change exposure.
Detection time is somewhere between 200 and 300 ms according to DataGhost's speed test; it's faster with silent pictures.
This feature is reserved to very advanced users. It can take pictures in LiveView mode without moving the mirror. When enabled, it saves uncompressed YUV422 frames from the LiveView image buffer when you press the shutter halfway.
*or turn it off)
Silent Picture: simple, low-resolution. Image resolution is usually around 1 or 2 MPix, and depends on the current mode (zoom or not, recording or not, and movie resolution). For almost-FullHD resolution (1720×974), choose
FullHDto record a dummy movie.
Silent Pic Hi-Res: emulates high-resolution by taking a matrix of small silent pics, in zoom
x5mode. You need to have the camera on a tripod and the subject should be static (a picture is taken in a few seconds). Could be useful for focus stacking or for timelapse without increasing shutter count.
Silent picture setting is applied to intervalometer and remote triggers. It will also go to LiveView when you press the shutter half-way. Therefore, you should only enable this setting when you actually use it.
Images are saved in
DCIM/1xxCANON/ after the following rules:
OFF, silent pics are named after last picture/movie taken without this function (e.g.
12340001.422). You are limited to 10000 silent pictures for each
ON, silent pics have names like
12345678.422. Tip: use
File Numbering → Manual Resetfrom Canon menu to increase folder number (to sort them easier).
To convert a 422 image to JPEG on the PC, use one of the following programs:
Mirror lockup. See Canon user guide for details.
Timer+Remote will auto-enable MLU under one of the following conditions (and disable it otherwise):
A few tweaks for flash users:
For MF users: takes a picture when the subject comes into focus.
AF-ON, depending on your settings).
holdthe half-shutter pressed for you. This will also block most buttons; press the shutter halfway to unlock them for two seconds.
Notes for LiveView trap focus:
SETto temporarily disable automatic scaling of focus magnitude.
Custom focus patterns which can be used either with autofocus or trap focus.
To change the focus pattern:
SET; you may or may not receive visual feedback.
Zoom Inbutton twice to see the current selection.
You can use the custom focus patterns in LiveView Quick Focus mode, too, but the pattern won't be displayed on the screen.
This feature was ported from 400plus.
Very simple follow focus (like a rack focus controlled manually).
Arrows: you will be able to focus with the arrow keys.
LCD Sensor: on 550D/500D, focus by placing your hand near the LCD sensor (avoiding shake). To use this, you may need to disable LCDsensor Remote.
Recommended focus step settings:
Quick rack focus while recording:
MENUto save current focus point (this means
I want to return here);
PLAYto go to saved focus point;
PLAYagain to go back.
Step size for one focus command, as used by EOS Utility.
Delay between two successive focus commands, with an optional waiting flag.
Waitis not active, ML will only wait a for fixed delay before sending next focus command. This will reduce stutter, but may affect rack focus accuracy. This setting is recommended if you only use follow focus.
Waitis active, ML will wait until each focus command is completed, and then it will wait for a fixed delay, as configured here. This will increase rack focus accuracy, but may cause stutter with certain lenses.
This is end point of rack focus (X focus steps from the start point, i.e. from current focus point).
First you have to set the end point. Focus the lens, then press
SET on this menu item.
After pressing SET, ML will display
Focus End Point: 0 steps from here.. This means the end point is now assigned to current focus position.
At this point, you will see the LiveView image and set the start point using left and right keys (just like with follow focus) or the main dial (scrollwheel). The start point will be always the current focus point (which you are changing); the end point will remain fixed.
Sets the number of seconds before starting a rack focus. This lets you film the start point first, then initialise the rack focus without touching the camera.
Triggers the rack focus operation that moves between the start and end focus points. After the move is complete pressing again reverses the move.
SET: rack focus will start after 2 seconds;
Q: rack focus will start immediately;
PLAY: ML will automatically record a short clip with the rack focus operation.
Focusmenu, go to
Focus End Pointand press
Setto zero it out.
LEFT/RIGHTbuttons while the Focus menu is active. Make sure the number from
Focus End Pointis changing as you focus. Fine-tune the position with scrollwheel.
Rack Focusand press
PLAYto start rack focus.
Away, you can trigger rack focus from the LCD sensor, avoiding camera shake.
Recommended focus step settings:
Step Wait: large delays (around 100 ms) ⇒ will ignore small position errors
Step Wait: small delays (use it only lens is in very good mechanical condition)
This selection will shoot a series of photographs with varying focus points. It is used in macro photography to assemble sharper final images by merging photos where each has a different focus point.
This function can also create scripts named like named
FST_1234.SH, which can be used for stacking the images with enfuse. See Exposure bracketing for details on how to use these scripts, and the focus stacking section from Enfuse reference manual. To enable (or disable) the post-processing scripts, go to HDR bracketing submenu.
Recommended focus step settings: same as for rack focus.
The following items are display only:
The distance to the focal point. Value is returned by most newer Canon lenses. If the lens does not report any distance information, 0 will be displayed and the DOF calculations will not be correct.
See also Focus distance.
The hyperfocal distance is the point of focus where everything from half that distance to infinity falls within the depth of field. This is the largest depth of field possible for the current f-number.
The nearest distance in which objects appear in focus.
The farthest distance in which objects appear in focus.
Options for display (most of them are for LiveView).
Adjusts the contrast in LiveView. It doesn't affect recording. This helps when focusing with very flat picture styles.
Values: Normal (no effect), High, Very high, Zero, Very low, Low.
Adjusts the saturation in LiveView. It doesn't affect recording. This helps you focus without being distracted by color.
Values: Normal (no effect), High, Very high, Zero (grayscale).
Photo mode only: this feature increases the brightness in LiveView, making it usable in very dark scenes (where Canon's LiveView would be pitch black). Combine this with FPS override for better low-light performance.
For movie mode, use ML digital ISOs for a similar effect.
This affects the colors and brightness of the on-screen information (including LiveView overlays, Canon menus and ML menus). Range from: Bright (default), Dark, Bright Gray, Dark Gray, Dark Red. Tip: dark themes may reduce the eye strain during night shooting.
Clear bitmap overlays from LiveView display.
HalfShutter: Hold the shutter half-pressed, or the
*button, or DOF preview for around 1 second to clear all the overlays from the Live View display (audio, zebra, crops, shutter speeds…).Tip: assign autofocus to
*button (from Custom Functions, set
Shutter/AE lock button=
WhenIdle: In this mode, all the overlays are erased from the screen (100% clean display) when the camera is idle (i.e. you don't press any buttons).
Always: In this mode, all the overlays are erased from the screen; you will have to change shooting settings blindly. You can still use the menus.Tip: this feature may be useful with External Recorders, since it removes the focus box and other graphics from the display.
With this setting you can choose to show the Focus box in liveview or hide it when not needed.
This option will force a low-resolution mode on HDMI displays (720×480), which avoids black screen when you start/stop recording.
Screen orientation, positioning fine tuning, adjustments for external monitors…
Choose screen layout (position of ML top and bottom bars), for different cameras or for external monitors.
This may make the image better visible from different angles (especially on cameras without flip-out screen).
For cameras with flip-out LCD, this options prevents mirroring the display when you open it at 180 degrees.
For cameras with flip-out LCD, you may select a different flipping/mirroring option.
Shows if the picture levels with the horizon. Can be used while recording.
For 50D only: disable Canon graphics elements to avoid conflicts with ML graphics in LiveView.
Idle/Menus: only enable Canon graphics when some transparent menu from LiveView is active.
Idle/Menus+Keys: only enable Canon graphics when you press some keys or navigate the transparent menus from LiveView.
Customize the image review (playback) mode:
When you hold
SET pressed and turn the main dial (scrollwheel), ML may perform one of these functions:
Play 422: display silent pictures from
Exposure Fusion: combine two or more images, useful for previewing HDR images or multiple exposures.
Compare Images: compare two images with a diagonal split view. The current image will always end up in the top half.
Timelapse Play: scroll through all your pictures quickly.
QuickReview default: just like in standard firmware.
CanonMnu:Hold→PLAY: if you set
Image Review: Holdin Canon menu, it will go to
PLAYmode instead. This allows you to zoom in as soon as you take the picture (without having to press
PLAY). Credits goto Ken Rockwell for suggesting this.
Faster zoom in PLAY mode, for checking critical focus:
Zoom Inwill zoom all the way in (to 100%) - on center point. Next press will zoom out (full screen image).
Customize the LiveView button in
Shortcut for erasing images without confirmation (hold SET and press ERASE). Be careful!
Select the features you want to adjust quickly with arrow keys: * Audio gain * ISO/Kelvin * Shutter/Aperture * LCD Brightness/Saturation
You can also enable quick functions for the SET button, coupled with the corresponding arrow adjustments:
Use the LCD face sensor as an extra key in ML (e.g. for triggering arrow keys, for blocking follow focus or for bypassing magic zoom key).
To fully disable the LCD sensor in Magic Lantern, disable
LCD auto off from Canon menu (Wrench 1). You need to do this if you are using a device which covers the LCD sensor (e.g. a loupe).
This will make the DOF preview button sticky (so you no longer have to hold it pressed).
Note: enabling DOF preview will block certain buttons.
Tip: enable Exposure Override to preview DOF without blocking the buttons.
This will make the half-shutter press sticky (so you no longer have to hold it pressed).
Tip: use this to prevent the camera from turning off LiveView after 30 minutes.
ERASE buttons. This feature allows one-handed navigation in ML menu on 60D, but will have to use
MENU button to delete the pictures.
On 600D/T3i, this lets you customize the behavior of
Zoom In / Zoom Out shortcut key in movie mode:
1x,3x: toggle between 1x and 3x digital zoom modes (FullHD)
3x…10x: default Canon setting (change digital zoom value between 3x and 10x).
Note: by default, Magic Lantern disables digital zoom values greater than 3x in order to avoid image quality degradation.
When enabled, it will temporarily reduce picture quality in burst mode in order to maintain a decent frame rate even when the buffer becomes almost full.
This function will reduce picture quality if the buffer has space for less than 4 pictures:
JPG Large Fine→
JPG Medium Fine
JPG Large Fine→
JPG Medium Fine
JPG Large Coarse→
JPG Medium Coarse
Possible results (550D, Transcend Class 10, your mileage may vary):
JPG-L, all others
RAW, all others
Options for maximizing battery life when using LiveView.
Magic Lantern saves its settings in a configuration file named
MAGIC.CFG, located under
ML/SETTINGS directory on your card. This submenu lets you customize how these settings are saved.
magic.cfgwhenever you change a setting in ML menu. Config saving process will take place as soon as you close the menu.
This feature lets you use up to 4 display presets for the settings in the Overlay menu.
On the top bar, you will see
DISP 0, 1, 2 or 3. Each of those is a preset for the settings in
Overlay menu. So you can, for example, configure
DISP 1 with false colors,
DISP 2 with zebras and focus peaking, and
DISP 3 with clear display.
This menu item sets the maximum number of available DISP presets. To disable this feature, set the number of presets to 1.
To change the current display preset, press
INFO/DISP in LiveView, or
[Q] on the GlobalDraw entry in the Overlay menu.
If enabled, ML bottom bar will display the 35mm equivalent focal length, including crop factor (1.6x).
For example, a 50mm lens at f1.8 will be displayed as:
50mm f/1.8with this option disabled;
80eq f/1.8with this option enabled.
To reduce menu clutter, Magic Lantern allows you to hide unused menu items. Enable this to display the hidden items, so you can re-enable them.
Functions for troubleshooting, development, and possibly unstable features.
Print screen after 10 seconds. This option saves a BMP file for the overlays and a 422 file (silent picture) for the LiveView image. The BMP does not contain transparency data. You can combine the two files in GIMP or other image editing programs.
The card LED will blink every second, until the screenshot is taken.
Create screenshots of all main menus at once.
Don't click it :)
This option runs various tests to make sure Magic Lantern is stable and will not crash. You can use it to test your particular configuration.
If it crashes, report an issue.
Displays the tasks started by Canon and Magic Lantern.
Saves a log with the CPU usage for all tasks.
Displays the amount of available RAM.
Displays the number of shutter actuations.
Displays the internal CMOS temperature, in raw units.
60D and 5D Mark II only: displays battery percentage, estimated time remaining and battery discharging rate.
For accurate readings, wait until the percentage indicator decreases by at least 2% since powering on.