Lens Correction, 153,  Distortion

153 Lens Correction

Reduces distortions and lateral chromatic aberrations occurring due to lens properties.

Distortion

Distortion is a phenomenon in which the center of the image appears inflated (barrel distortion) or the center of the image appears pinched (pincushion distortion). Distortion occurs more easily when using a zoom lens or a small diameter lens, and straight walls or the horizon in an image appear curved.

Pincushion distortion

Barrel distortion

Lateral chromatic aberration

Lateral chromatic aberration is a phenomenon in which the magnification of an image varies according to the colors (wavelengths of light) when a picture was taken, and may cause a blurred image. Chromatic aberration occurs more easily at shorter focal lengths.

5 ShootingSettings

Page 155

Image 155

Pentax K-50 specifications Lens Correction, 153,  Distortion,  Lateral chromatic aberration, Pincushion distortion

Contents

Operating Manual Regarding trademarks Regarding copyrights To users of this camera For Using Your Camera SafelyAbout the Camera About the Battery Charger and AC Adapter About the Usage of AA Batteries About the Rechargeable Lithium-ion BatteryPrecautions for D-LI109 Battery Usage Care to be Taken During Handling Before Using Your Camera Storing Your Camera About the Battery and ChargerPrecautions on Carrying and Using Your Camera Cleaning Your Camera About Eye-Fi Cards Write-protect switchAbout SD Memory Cards Regarding User Registration Memo Getting Started ContentsBefore Using Your Camera Shooting Functions Basic Operations Shooting Settings Playback Functions and Image Editing Connecting to a Computer Changing Additional Settings Appendix Using the Flash Composition of the Operating Manual Indicates useful information Symbols used in this Operating Manual are explained belowIndicates precautions to take when operating the camera How to Change Function Settings Before Using Your Camera Checking the Contents of the Package Names and Functions of the Working Parts DGreen button Capture ModeMain switch EV Compensation Button Lens unlock button Mode dialFocus mode switch Front e-dial R 3button Playback ModeFour-way controller I Delete button Shooting Info Display Selection screen Capture ModeMonitor Display Control panel Camera Settings for shooting with the viewfinder are displayed Status screen Button guide AE Metering p.97 AE Lock p.96 Live ViewYour AF frame Before Using Your Camera Mode Still picture capture modeBefore Using Your  Control panel Display Off Nothing is displayed on the monitor  Shooting Info DisplayRed Return to the status screen Single image display Standard Information Display Playback ModeDisplay Indicators are displayed Detailed Information Still picture Use the four-way controller 23 to switch between pages Detailed Information Display Focus mode p.101/AF point p.104/Contrast AF p.106 Histogram before and after shooting Using the Histogram Histogram Display/RGB Histogram Display Histogram shows the brightness Guide Indicators Viewfinder Changing AF point p.105 Before Using Your Camera 10 ISO/ISO Auto p.87Sensitivity/Remaining image storage capacity AE Lock p.96  Electronic Level Display Press the 4button How to Change Function SettingsUsing the Direct Keys Press the four-way controller Standby mode Control panel appears Using the Control PanelPress the Mbutton Standby mode Setup screen of the selected item appears Halfway Using the MenusPress the 3button in standby mode Press the 3button or the shutter release button Press the four-way controller Use the four-way controller 23 to select a settingPress the four-way controller 5 twice Use the four-way controller 23 to select an item Press the 3button Attaching a Lens Attaching the Strap Inserting the BatteryTurning the Camera On and Off Initial Settings Attaching the Strap Battery charger Inserting the BatteryUsing the Lithium-ion Battery Charging the Battery GettingStarted Inserting/Removing the Battery Available Batteries Characteristics AA lithium batteries Using the AA BatteriesClose the battery cover Battery cover is locked Battery Level Indicator Open the battery cover Using the AC Adapter GettingStarted Inserting/Removing an SD Memory Card Push the SD Memory Card in once to remove Close the card cover 3, Then slide it in the direction Arrow Attaching a Lens To remove the lens Remove the front lens cap byPushing the indicated portions Inward Getting Started Adjusting the Viewfinder Diopter Turning the Camera On and Off Turn the main switch to onAlways turn the camera off when not in use W Hometown screen appears Initial SettingsSetting the Display Language Initial Setting screen appears in the selected language Press the four-way controller 3 to select DST, and use Initial Setting screen reappearsUse the four-way controller To select a city Choose mm/dd/yy, dd/mm/yy or yy/mm/dd Setting the Date and TimeUse the four-way controller 23 to set the month Set the current date and time and the display style TimeTime 10001000 Memo Basic Operations Basic Shooting Operation Letting the Camera Choose the Optimal SettingsTaking Pictures Using the Viewfinder Set the mode dial to n Flash Set the focus mode switch to lLook through the viewfinder to View the subject Is available. p.72 Press the shutter release button fullyReview the captured image on the monitor Available operations Live View image is displayed on the monitor Setting the Flash Mode Using the Built-in Flash Capture Mode Selectable Flash Mode E/F/r G/H/I/r A/p K/r Press the four-way controller 4 in standby mode Operations Compensating Flash OutputPress the four-way controller 3 in on p.69 Turn the rear e-dial S Take a picture Using the Built-in FlashPress the Ebutton You can play back captured images with the camera Reviewing ImagesPlaying Back Images Press the Q button Image is deleted Deleting a Single ImageYou can delete images one by one Delete confirmation screen appears Memo Taking Pictures Continuously Setting the Exposure FocusingChecking the Depth of Field Preview Camera Shake Direct Keys Setting Items How to Operate the Shooting Functions Rec. Mode Menu Items GPS Sets the microphone sensitivity Movie SR *1 Movie Menu ItemsFramerate *1 Sets the number of frames shot per Second 130 Quality Level *1 Sets the quality level of the movie Custom Setting Menu Items 215 Save Menu Location Dial indicator Selecting the Appropriate Capture ModeCapture Mode Characteristics NAuto Picture mode Mode for the subject Auto Picture Modes HDR Scene Modes Press the Mbutton Selecting a Scene Mode Set the mode dial to HCamera switches to the Hmode status screen Scene Mode selection screen appears Automatic Exposure Aperture value Manual Exposure Exposure ModesFunctions Priority Use the four-way controller 23 to select ISO Auto or ISO Setting the ExposureSetting the Sensitivity Press the four-way controller 2 in standby mode ShootingFunctions Available # Restricted × Not available Changing the Exposure ModeSet the mode dial to e, K, b, c, L, a or p Turn the front e-dial R Shutter speed can be changed in b, L, or a mode Exposure ends Bulb ShootingTake your finger off the shutter release button Press the m button 1, and then turn the rear e-dial S Adjusting the ExposureExposure is adjusted Standard exposure Underexposure Overexposure + Standard  Underexposed  Overexposed default setting Press the shutter release button halfway Press the four-way controller 5 in standby modeSet the bracket value Press the shutter release button fully Set the exposure, and press the =/Lbutton Refer to Setting the =/LButton Operation p.169 for detailsLocking the Exposure Before Shooting AE Lock Assign AE Lock to the =/Lbutton Camera returns to the control panel Press the Mbutton in standby modeSelecting the Metering Method AE Metering screen appears High-ISO NR screen appears Reduces noise at high ISO sensitivity settingsReducing the Image Noise Noise Reduction High-ISO NR Sensitivity value To select a sensitivity value,To set the level of noise reduction Which is applied to the selected Shooting Functions 100Slow Shutter Speed NR Reduces noise during long exposures 101 FocusingSetting the Focus Mode TTL phase-matching autofocus 102 Autofocus Modes when Shooting with the Viewfinder FPS 103 AF Active Area screen appears Selecting the Focusing Point AF Point104 Select the desired AF point 105 Contrast AF screen appears Setting the Contrast AF during Live View106 107 Select the AF area Selecting the Desired Focusing Area108 Select G in on p.106, and press the 4button Autofocus system operates Checking the Focus109 Turn the rear e-dial S to change the magnification 110 Adjusting the Focus Manually Manual FocusFocusing Using the Viewfinder Image on the monitor is magnified 111Press the 4button or the shutter release button halfway 112 AF Fine AdjustmentPress the four-way controller 5, and adjust the value 21. AF Fine Adjustment screen appears Press the 3button three times Adjustment value is saved How to Take Pictures 113 Preview Method Description Optical Preview Checking the Depth of Field PreviewDisplaying the Optical Preview Take your finger off the V/Ybutton Focus on the subject, and press the V/Ybutton Displaying the Digital Preview115 Assign Digital Preview to the V/Ybutton Shake Reduction screen appears Using the Shake Reduction Function to Prevent Camera ShakeTaking Pictures Using the Shake Reduction Function 117 Self-timer shootingYou can also change the setting from the a Rec. Mode 3 menu Use the four-way controller 45 to select P Off or O On 118Correcting the Tilt of the Images Camera is ready to take a picture Shooting with the Self-timer119 120 121 Shooting with a Remote Control Unit Optional 122 123 Taking Pictures ContinuouslyContinuous Shooting 124 Interval Shooting screen appears Press the 4button to complete the settingInterval Shooting 125 Camera is ready to take a series of interval pictures 126If you selected Now, proceed to Step 127 Select from 2 to 9 shots Multi-exposure128 Multi-exposure screen appears Exposure Bracketing and Lens Correction are not available 129Take the picture Multi-exposure is ended Compensation value. default setting Changing the Settings for Movie RecordingSet the mode dial to C, and press the 3button Movie Capture Settings screen appears Set Quality Level to C, D, or E Press the 3button 131Select Recorded Pixels Select Framerate Press the shutter release button again Set the mode dial to CRecording Movies 132 Flash is not available 133 Interval Movie screen appears Interval Movie134 135 Movie playback starts Playing Back Movies136 First frame of the movie is displayed on the monitor Save confirmation screen appears 137Capturing a Still Picture from a Movie Press the m button 138 Select a point where you want to divide the movieEditing Movies 139 140 Correcting Images Setting a File FormatSetting the White Balance Setting the Image Finishing Tone Settings Setting a File FormatImage Capture Settings screen appears You can set the format of image files File FormatJpeg Recorded Pixels 143 You can select a color space to use Jpeg QualityColor Space 144 145 Setting the White Balance Fine-tune the white balance Press the four-way controller 3 in standby mode146 Use the four-way controller 45 to select the white balance Use the four-way controller 45 to select K1 to K3 Adjusting the White Balance Manually147 Select K in on p.146, and press the four-way controller Turn the front e-dial R to select an image Saving the White Balance Settings of a Captured Image148 149 Adjusting the White Balance with Color Temperature Highlight Correction or Shadow Correction screen appears Brightness AdjustmentUse the four-way controller 45 to change the settings Correcting Images HDR Capture screen appears This section explains how to set HDR CaptureHigh Dynamic Range Image Capture 151 152 Select from ±1 EV, ±2 EV default setting or ±3 EV  Lateral chromatic aberration Lens Correction153  Distortion Use the four-way controller 45 to select Off or On 154 Composition Adjust. screen appears Composition AdjustmentSelect Start adjustment, and press the 4button Adjust the composition 156 157 Setting the Image Finishing ToneCustom Image 158 Screen to adjust the parameters appears 159 You can check the saturation and hue with the radar chart Turn the front e-dial R to select a cross processed image Saving the Cross Processing Settings of a Captured Image160 161 Digital Filter Use the four-way controller 2345 to select a filter Shooting Settings162 163 Customizing the Button/E-dial Functions Setting the E-dials OperationUse the four-way controller 23 to select an exposure mode Screen for the selected exposure mode appears Auto Following settings can be selected for each exposure mode165 ESHIFT ELINE BSHIFT CSHIFT Depends on the Exposure Setting p.130 of the C Movie 1 menu166 Press the 4button Press the 3button Button Customization screen appears Setting the V/YButton Operation167 Select , and press the four- way controller Use the four-way controller 23 to choose a file format Setting the One Push File FormatIs taken. default setting 168 Off the =/Lbutton to return to normal autofocus operation Setting the =/LButton Operation169 A mode cannot be set when the mode dial is set to n, Hor C Saving Frequently Used SettingsSaving the Settings Save User Mode screen appears Text-entry screen appears Editing a Setting NameRename User Mode screen appears 171 Cursor 172Four-way controller Moves the text selection cursor Cursor at the position of the text input cursor 173 Checking the Saved User SettingsUsing Saved User Settings Set the mode dial to Bor C Reset User Mode screen appears Resetting to Default SettingsChange the settings as necessary Resets the settings saved as a mode to the default settings Deleting Multiple Images Connecting the Camera to an AV DeviceFunctions Selecting the Playback Functions Function Image Rotation *1 How to Operate the Playback/Edit FunctionsPlayback Mode Palette Items Playback Functions and Image Editing 177 Playback Menu Items Rotation Info in the ACustom Setting 3 menu is Setting the Playback Display MethodSelect from ×16, ×8, ×4, ×2 or Off default setting Based on the rotation information when 18. Save 179 Images can be magnified up to 16 times in playback modeSelecting the Playback Functions Magnifying Images Turn the rear e-dial S to the right toward y Displaying Multiple Images180 Select the images to display Use the four-way controller To select the display style 181Changing the Multiple Image Display Style Press the Mbutton in on p.180 182 183 Setting the Slideshow DisplayPlaying Back Images Continuously Start screen is displayed and the slideshow starts 184 Image rotation information is saved Rotating Images185 You can delete multiple images at once Deleting Multiple ImagesDeleting Selected Images Select images to delete Folder display screen appears Deleting a Folder187 Selected images are deleted Confirmation screen for deleting all images is displayed Deleting All Images188 Screen to select the recorded pixels appears Processing ImagesChanging the Number of Recorded Pixels Resize 189 Four-way controller Moves the cropping frame Rear e-dial S Cutting Out Part of the Image Cropping190 Cropped image is saved as a new image White Magenta/Blue/Cyan/Green/Yellow Processing Images with Digital Filters191 Extracted Color 2 OFF/Red 192 Screen to select a filter appears Four-way controller 45 to Adjust the value193 To select a parameter Image Editing 194Recreating Filter Effects Filter effects used for the selected image appear Filter-processed image is saved as a new image 195To check the parameter details, press the Mbutton Image selection screen appears Press the four-way controller 3 in the single image display Index setting screen appearsJoining Multiple Images Index 196 Index image is created and a confirmation screen appears Processing may take a while when creating an index image197 You can select a white or black background Screen to select a development method is displayed Developing RAW ImagesDeveloping One RAW Image RAW image is developed and saved as a new Jpeg image 199Use the four-way controller 45 to change the value Following parameters can be changed Select the RAW images to be developed You can develop multiple RAW images with the same settingsDeveloping Multiple RAW Images 200 Pixels and Jpeg Quality 201Use the four-way controller To set Jpeg Recorded Connecting the Camera to a Video Input Terminal Connecting the Camera to an AV Device Interface Options screen appears Setting the Video Output Format203 Turn the AV device and camera on 204 File Management Settings How to Operate the Set-up MenuCamera Settings USB How to Operate the Set-up MenuChanging Additional Settings Set-up Menu Items 224 Folder File Name 207Menu Function Create New Sound Effects 1 screen appears Camera SettingsSetting the Sound Effects Use the four-way controller 45 to adjust the volume Use the four-way controller 45 to select a destination city Setting the World Time209 210 Region City 211 List of World Time Cities 212 Setting the Monitor and the Menu DisplaysSetting the Electronic Level Display Setting the LCD Display LCD Display Settings screen appears Adjusting the Brightness and the Color of the MonitorUse the four-way controller 45 to adjust the value Adjusts the brightness and the color of the monitor Instant Review screen appears Setting the Display for Instant Review214 19. Save Menu Location screen appears Setting the Initial Menu Tab to be DisplayedARec. Mode 1 menu C Movie 1 menu 215 AA Battery Type screen appears Battery SettingsMinimizing Battery Consumption Setting the Battery Type Memory 1 screen appears Selecting Settings to Save in the Camera MemoryFunction Default 217 Turned off Settings are saved even when the camera is turned off218 Turn the rear e-dial S to display the Memory 2 screen 219 Resetting the Camera SettingsResetting the Rec. Mode/Movie/Playback/Set-up Menus Resetting the Custom Menu Changing Additional SettingsChecking the Camera Version Information 220 Format screen appears File Management SettingsFormatting an SD Memory Card 221 To select Protect, and press Button Protecting Images from Deletion Protect222 If you selected Date, proceed to Step Setting the Naming System of the Folder223 Create New Folder screen appears Creating New Folders224 Folder name is changed File Name screen appears Setting the File Name225 Folder with a new number is created Change the text Setting the Photographer InformationSelecting the File Number Setting 226 Enter the text 227 Eye-Fi screen appears Using an Eye-Fi Card228 Folder selection screen appears 229Transferring Selected Images Screen to select the unit of transfer appears Images to be transferred are specified Transferring process cannot be canceled once started230 Select the images to transfer 231 Setting the Dpof SettingsYou can set up to 99 copies Press the Mbutton to select P or O for printing the date 232 Saving Images on a Computer Using the Provided SoftwareComputer Computer Manipulating Captured Images on a Computer Windows  Macintosh Unless otherwise specified, select MSC Setting the USB Connection ModeSaving Images on a Computer 235 Save the captured images to the computer Connecting the Camera and a Computer236 Turn the camera on Turn the computer on Using the Provided SoftwareInstalling the Software 237 Click Silkypix Developer Studio 3.0 LE Connecting to a Computer238 Regarding User Registration 239 240 Using the Flash Using the Flash in cMode Flash Characteristics in Each Exposure ModeUsing the Slow-speed Sync Flash Using the Flash in bMode Built-in flash pops up Set the flash mode to Gor HUsing the Flash 243 ISO Sensitivity Built-in Flash Guide Number Approx 244Calculating Shooting Distance from Aperture Value Calculating Aperture Value from Shooting Distance Flash Built-in Using an External Flash OptionalSlave flash High-speed sync Wireless flash 245 246 Using the P-TTL Auto Flash 247 Using the High-speed Sync Flash First, set the channel for the external flash unit Using Flash in Wireless ModeSetting the Channel for the External Flash 248 Off Discharges the built-in flash as a control flash 249 Control Connecting an External Flash with an Extension Cord250 Master 251 Multiple Flash Shooting Using Extension CordsWhen combining with the built-in flash When combining two external flashes Refer to p.250 for details Using the Contrast Control Sync Flash252 Connect the external flash to the camera indirectly Error Messages Default SettingsCleaning the Cmos Sensor Using the GPS Unit Appendix Default SettingsRec. Mode Menu Direct Keys AF.A 255 Tracer GPS 256Astro Dpof Playback Mode Palette257 Movie Menu Set-up Menu 258Playback Menu 259 ACustom Setting Menu 260 DA L Functions Available with Various Lens Combinations261 FA J Lens names and mount names Lenses and accessories that cannot be used with this camera262 Available with some restrictions 263Lens and Built-in Flash Unavailable due to vignetting Turn the rear e-dial S to set the focal length Setting the Focal Length264 Attach a lens, and turn the camera on 265 Dust Removal screen appears Removing Dust by Shaking the Cmos Sensor Dust RemovalShaking the Cmos sensor removes dust from the sensor unit 267 Sensor Cleaning screen appearsDo not clean the sensor when the mode dial is set to p Removing Dust with a Blower Attach the lens or body mount cover Clean the Cmos sensor268 Turn the camera off Astrotracer Using the GPS Unit269 Select ASTROTRACER, and press the four-way controller Shooting Celestial Bodies Astrotracer270 Press the shutter release button fully again 271 Error Messages 273 274 Available space on Troubleshooting275There is no AF area Problem Cause Remedy276 Subject is outside the AF area, aim Use a tripod 277 File Formats Main SpecificationsAppendix Model Description Image Capture Unit LCD Monitor Focusing System279 Live View Shutter Drive Mode280 Appendix Exposure Control Movie 281Capture Functions Customization 282Appendix Playback Functions 283 Power SupplyDimensions and Weight Accessories 284 285 Index 286 287 288 289 290 291 Warranty Policy CE Mark is a Directive conformity mark of the European Union 293 Pour les utilisateurs au Canada 294For customers in USA For customers in Canada 295 Class B Personal Computers and Peripherals 296 Memo SL3 8PN, U.K FranceDeutschland GmbH Germany