2.6.13dev7

• Windows: add camera DLL missing from today's 2.6.13dev6 release.
• No other changes in this release. Please see the dev6 changes for what's new.

2.6.13dev6

• Improved display of magnified star in StarProfile
• Improved Guiding Assistant exposure recommendations for encoder mounts
• Improved experience when MultiStar processing and subframes are both enabled
• Better handling of the minimum focal length setting
• Improved experience when the image scale changes
• Better handling of the Saturation ADU setting when camera 8/16 bit mode is changed
• Predictive PEC: fix for possible PHD2 crash when there is an extremely large dither
• Predictive PEC: use the monotonic clock rather than the system wall clock
• server: fix possible problem when imaging app sends multiple overlapping requests
• Improved alert message when Dec guiding is ineffective
• Altair cameras: update to SDK version 20241216_57.27250
• OGMA cameras: update SDK to version 57.26291.20240811
• Player One cameras: native support added using SDK version V3.7.1
• QHY cameras: improved native camera support
• Svbony cameras: update SDK to v1.13.2
• Touptek cameras: update SDK to version 57.27348.20241224
• Updated Czech and Spanish translations
• Help file updates
• Special thanks to our new contributors - see the Help > About window

2.6.13dev5

• Update Windows VC runtime redistributable DLLs to version 14.40.33810.0, 32-bit
• Touptek cameras: update SDK to version 56.25996.20240707
• QHY cameras: update SDK to version 24.03.29
• OGMA cameras: update SDK to version 2024-06-20

2.6.13dev4

• Improved handling of image scale changes
• Improved layout of text labels in the Target window
• Fix a potential error when an imaging app sends a command for a zero-pixel dither
• Touptek cameras: update Touptek SDK lib to version 55.25633.20240519
• Windows: add missing DLL file
• Updated Czech translation

2.6.13dev3

• OGMA cameras: OGMA cameras are now supported in PHD2
• Svbony cameras: SDK updated to version v1.12.6
• opencv cameras: Opencv updated to version 4
• opencv cameras: now available on Mac and Linux
• ask-for-coordinates aux mount is working again
• updated translation: Traditional Chinese
• ra-only guiding: more accurate display of ra error value when RA-only guiding is in effect
• event server: added interfaces to get/set variable delay parameters
• Help file updates

2.6.13dev2

• Mac: Fix crash on Sonoma when a status alert message is displayed
• Windows installer: add missing required dll msvcp140.dll
• Star profile window: improved layout, better font size, and more accurate display of crosshairs
• Performance improvement displaying camera images
• Prevent resizing of rows and columns in stats window grids
• Touptek cameras: update to SDK version 55.24621.20240204
• INDI: Rotator support added
• INDI: Wait for Indi devices to be ready when connecting
• INDI: Better error message for RGB FITS file
• Updated Czech and Spanish translations

2.6.13dev1

• Windows: remove cameras with obsolete SDKs: Fishcamp, Meade-DSI, SAC4-2, SSAG. To use these cameras, stick with an older version of PHD2.
• Mac: no longer building for 32-bit Macs. To use 32-bit Macs, stick with an older version of PHD2.
• INDI: update to INDI 2.0
• Touptek cameras: update SDK lib to version 55.24239.20231224

2.6.13

• fix a problem where the camera settings are not displayed properly on some computers

2.6.12

• Star profile: add option to toggle between raw and interpolated views of the star
• Multistar guiding: better tolerance of passing clouds
• Calibration Assistant: some small improvements to the assessment
• New Profile Wizard: add ability to set saturation ADU based on camera bit depth
• Fix a possible crash after closing the ASCOM Mount properties window
• INDI: compute LST in PHD2 if INDI driver does not provide it
• Altair cameras: update SDK to version 54.23860.20231112
• Touptek cameras: update SDK to version 54.23926.20231119
• ZWO ASI cameras: update SDK to v1.30 (2023-07-18)
• Svbony cameras: update SDK to v1.11.4
• Moravian cameras: update SDK to v4.15
• Updated translations: Spanish, Japanese, Traditional Chinese, Czech

2.6.11dev6

• Svbony Cameras: update SDK to version v1.11.2 (2023-04-24)
• Touptek Cameras: update Touptek lib to version 54.22587.20230516
• Calibration Assistant: minor UI tweaks and help file updates
• Updated Japanese translation

2.6.11dev5

• New Calibration Assistant tool
• Multi-star guiding: fix possible loss of secondary stars after a huge dither
• QHY cameras: update to SDK version 2023-05-10
• Touptek cameras: update SDK to version 53.22412.20230409
• Updated Czech, Japanese, Simplified Chinese and Traditional Chinese translations
• PHD2 now compatible with INDI 2.0

2.6.11dev4

• Improved alert messages for camera geometry mismatches
• Fix problem launching PHD2 on some Windows computers (missing vcomp140.dll)
• Updated Czech translation from Stanislav
• Updated Japanese translation from nabePla
• Updated Simplified Chinese translation from Linkage

2.6.11dev3

• Protect against mount drivers that report invalid guide speeds
• Clarify some error messages
• New profile wizard now asks for a Rotator selection (optional)
• Svbony Cameras: update SDK to v1.10.0
• ZWO ASI Cameras: update SDK to version V1.27
• Updated Japanese translation
• Help file updates

2.6.11dev2

• Reduced CPU utilization when rendering the camera image on the screen
• Help content overhaul and restructuring
• INDI Cameras: reduced CPU utilization
• ZWO ASI Cameras: reset colour balance to unity on connection
• ZWO ASI Cameras: update SDK to v1.26
• Moravian cameras: update SDK to version v4.11
• Svbony Cameras: update SDK to v1.9.4
• Svbony Cameras: native support enabled for Linux and Mac
• Svbony Cameras: wait for ST4 guide pulse to complete before starting the next exposure
• Updated Traditional Chinese translation
• Updated Portuguese (Brazilian) translation
• New Czech translation

2.6.11dev1

• New option for variable exposure delays -- helpful for very accurate mounts
• New Profile Wizard and Guiding Assistant: improved for mounts with high precision encoders
• Allow selecting lower values of the minimum HFD setting

2.6.11

• For new profiles the default is now to enable multi-star guiding and disable star mass checking
• Display centroid coordinates in the star profile window
• Add support for observatory-class focal lengths
• ZWO ASI cameras: update SDK to version v1.20.3
• Svbony Cameras: update SDK to v1.6.4 and fix possible camera hangs when changing binning or ROI

2.6.10dev3

• Minor adjustments to Guiding Assistant, minMove floor, SNR checking
• Enable Min HFD checking by default
• Svbony cameras: update to SDK v1.6.1
• Updated Spanish translation

2.6.10dev2

• ZWO ASI cameras: update SDK to version V1.20 - Windows, Mac, and Linux
• Linux: update launcher icon to work better with Ubuntu/Gnome
• Svbony cameras: update SDK to version 1.4.4
• Svbony cameras: add support for SV305M PRO and other monochrome cameras

2.6.10dev1

• Svbony cameras: update SDK to version 1.4.2
• Touptek cameras: fix problem on MacOS locating the SDK dylib
• Updated French translation

2.6.10

• Svbony cameras: update SDK to version 1.3.7
• ToupTek cameras: update SDK to version 48.18081.2020.1205
• ZWO ASI cameras: update SDK to version 1.19
• Updated Spanish and Traditional Chinese translations

2.6.9dev5

• QHY cameras: update to SDK version 20210313_17 (Windows)
• Altair cameras: add an option to discard initial camera frames
• ASCOM cameras: fix an error from some cameras about invalid frame size after disconnecting and re-connecting the camera
• INDI cameras: fix a problem where the INDI server's binning value could override PHD2's binning setting
• Stats window - restore the size and position when PHD2 is restarted
• event server API: add star info to the LoopingExposures event
• Updated Catalan and Spanish translations
• Tool-tip and status bar message updates
• Help file updates

2.6.9dev4

• Windows installer: fix 32-bit Windows incompatible version of vcruntime140.dll added in v2.6.9dev3
• Multi-star: change display when primary star is lost
• Multi-star: reduce aggressiveness of dropping lost secondary stars
• Guide stats: fix incorrect max deflection calculation
• ZWO cameras: update SDK to V1.16.3 (Windows, Mac, Linux)
• New Catalan translation
• Updated Traditional Chinese translation
• Updated Help file

2.6.9dev3

• Altair cameras: update SDK to version 2020.1223
• Graph stats: exclude dither recovery frames from stats
• Multi-star: correctly report guide star distance to imaging apps
• Multi-star: do not automatically reset the Use MultiStar option in the UI
• WDM cameras: fix divide-by-zero crash when camera driver does not report AvgTimePerFrame
• Windows installer: include vcruntime140.dll
• Help file updates: add info about star-saturation controls and camera cooler
• Updated French translation

2.6.9dev2

• New: Multi-star guiding
• New: Moravian camera support
• Bug fix: ensure Dec comp is applied when meridian flip is accompanied by a Dec slew
• ZWO: update ZWO ASI SDK to version 1.16 - Windows, Linux, and Mac
• SBIG cameras: remember choice of whether to use the tracking CCD
• ZWO / INDI / ASCOM cameras: use binned frame size reported by camera
• ZWO camera: fix possible crash when changing binning
• INDI cameras: discard stale video frames when switching binning
• INDI cameras: improved verbose INDI logging
• Fix crash when cancelling AO port selection
• Fix crash when new profile created with mount set to None
• Fix incorrect pixel size change warning when new profile is created
• Updated French, Polish and Traditional Chinese translations

2.6.9dev1

• New Svbony camera support
• Altair cameras: update to SDK 46.17427.2020.0704
• ZWO cameras: update SDK to version V1.15.0617
• Disable Dec guide param controls if Dec guide mode is None
• Updated dark subtraction method fixing a problem with pedestals being set too high
• Shift-click on the auto-select button now de-selects the guide star
• Updated Help
• Updated Traditional Chinese translation

2.6.9

• Updated Help file
• Guiding Assistant: improved dec backlash measurement to better handle some poorly behaving mounts
• Polar Drift Align: add Mirror option for OAG users
• Log uploader: do not display empty logs by default
• Fix background color in the Drift Align window to honor the window manager color theme
• INDI: remove the obsolete driver port selection option
• New Galician translation
• Updated French translation
• Updated Portuguese translation

2.6.8

• No longer display an alert when little South movement is detected after calibration
• Altair cameras: update to SDK version 46.16909.2020.0404 (Windows)
• Updated Traditional Chinese translation

2.6.7dev1

• Altair cameras: update SDK to 39.15529.2019.0906 (Windows)
• Guiding Assistant: display guide pulse duration on the backlash test graph
• QHY cameras: fix incorrectly-reported bits-per-pixel value for 16-bit cameras
• QHY cameras: fix problem with camera going unresponsive after the stop button
• is clicked
• Better tolerance of INDI/ASCOM drivers that incorrectly report guide speed

2.6.7

• Linux/Mac: save PHD2 settings after significant changes, like after calibration completes
• Mac: no longer need to restart PHD2 when first run to disable AppNap
• server: added option to specify a region of interest for star auto-selection
• Help file updates
• logging enhancements
• Updated Korean, Russian and Traditional Chinese translations

2.6.6dev4

• PHD2 now produces a single debug log and guide log per night rather than a set each time the app is launched
• Saturation detection by max ADU value is now the default setting for new equipment profiles
• Guiding Assistant: slightly more aggressive RA min-move recommendation
• Log upload tool improvements
• Guide log now includes the orthogonality error value and the RA guide rate normalized to Dec 0
• Improved handling of guide speed and image scale changes
• EQMOD ASCOM: display EQMOD-specific instructions in the new profile wizard
• iOptron iGuider camera support (Windows)
• QHY cameras: Linux/Mac: remove unnecessary debug messages when run from command-line
• QHY cameras: Linux: updated SDK to V2019.11.15.0
• Add check for problematic AP ASCOM driver synchronous guide pulse mode
• Bug fix: do not repeatedly show alert about dark file mismatch when disconnected camera reconnects
• Bug fix: do not display pulse guide limit reach alert after a long Guiding Assistant run
• Linux: show the translated language names (as we already do on macOS and Windows)
• Display the "you must restart phd2 for the language change to take effect" message translated
• cfitsio package updated to version 3.47
• Fixed flicker of controls in graph window
• Updated Korean and Russian translations, plus a new Japanese translation of the Help file
• Help file updates
• event server: add an optional ROI argument to find_star and guide methods
• event server: add LockPositionShiftLimitReached event notification
• event server: add option to get_lock_shift_params method to ask for x/y shift rate
• debug log improvements

2.6.6dev3

• Mac: 64-bit version of PHD2 for macOS Catalina
• QHY cameras: update macOS SDK to version V20191115_0 (32-bit and 64-bit)
• QHY cameras: log the QHY SDK version in the debug log
• ZWO cameras: update to SDK version V1.14.1108 (windows, mac, linux)
• Workaround for imaging apps which fail to un-pause PHD2: stop button un-pauses guiding
• Updated French translation
• Updated Traditional Chinese translation
• Fix potential crash when AO graph is updated by a thread other than the main UI thread
• Fix unlikely crash if imaging app tells phd2 to start guiding just as user closes app
• Extend auto-adjustment of guiding params for changes to pixel size, binning, or focal length

2.6.6dev2

10 September 2019

• New button on the main toolbar for auto-selecting a star
• New option to enable/disable audible beep for lost star
• Soften wording of some calibration alert messages to be more advisory in nature
• Fix various problems running the Guiding Assistant with an AO unit
• Changing the Dec Flip calibration option now triggers a new calibration
• Guiding Assistant: better recommendation for polar alignment
• Guiding Assistant: rework min-move recommendations to handle long G.A. runs
• Guiding Assistant: fix incorrect display of +/- symbol
• New profile Wizard: added an option for auto-restoring calibration
• Polar drift: allow window to be resized; save size and position across sessions
• Altair cameras: update to SDK version 38.15031.2019.0706 (Windows)
• INDI cameras: new option to suppress fallback to streaming mode
• INDI cameras: do not start exposure until prior exposure has completed
• INDI: ensure device names always include "INDI"
• ASCOM cameras: fix crash attempting to set cooler after camera is disconnected
• Server: add star HFD to guide step event
• Server: new ConfigurationChange event
• Server: allow clients to send multiple overlapped requests
• Updated French translation
• Updated Traditional Chinese translation
• Updated Help content

2.6.6dev1

• Equipment profile wizard and Guiding Assistant now recommend Lowpass2 Dec guiding for mounts with high-res encoders or near-zero backlash
• Calibration is now automatically cleared if the camera selection is changed
• Predictive PEC: enable the model retaining option by default for new profiles
• ZWO cameras: update to SDK version 1.14.0227 (Windows, Mac, and Linux)
• New Omegon Pro camera selection
• INDI mounts: fix incorrect LST fallback calculation for mount drivers that do not provide LST
• Guide log: ensure monotonically increasing timestamps regardless of changes to the system clock
• Minor debug log cleanup
• Camera simulator: fix crash when no mount or AO is selected
• Fix crash in connect equipment or advanced dialog when AO is selected but mount is None
• Updated French translation

2.6.6

• Mac: MallinCam SkyRaider camera support
• INDI SBIG AO support
• Drift Align tool: auto-select a new star if star was lost in the Adjust phase
• Fix Advanced Settings window problem where typing invalid characters in the focal length field could set it to zero
• Minor UI updates: improve some tool tips; re-enable the camera selection button after the camera is disconnected
• Server API: include calibration declination in get_calibration_data message
• Added command-line options for saving and loading the full set of config settings to/from a file
• Additional logging in the debug log
• Updated French and Traditional Chinese translations

2.6.5dev7

• Guiding Assistant: new feature to review prior G.A. run results
• Guiding Assistant: avoid too large min-move recommendations
• Guiding Assistant: check for poor camera focus
• Guiding Assistant: recommend binning when image scale is too low
• Calibration review: show calibration side of pier
• Add menu items for toolbar button functions
• Backlash compensation: better resiliency against stiction
• Dark libraries: fix problem loading the wrong dark frame for exposures below 0.02s
• Connect gear: only enable camera selection button when camera driver supports multiple cameras
• ASCOM scopes: better handling for ASCOM drivers that terminate outside of PHD2
• Altair cameras: update to SDK version 30.13270.2018.1102
• ToupTek cameras: update to SDK version 33.13814.2019.0120
• ZWO cameras: use snap mode for USB cameras USB2 mini cameras - fixes various guiding stability problems caused by video mode
• Linux: add Touptek camera support
• Linux: fix a potential crash related to INDI text properties
• Fix long-standing possible crash when Manual Guide tool is run with On-camera mount
• Updated French and Traditional Chinese translations

2.6.5dev6

• New Meridian flip calibration tool
• New: ToupTek camera support for Windows; using ToupTek SDK version 30.13059.2018.1003
• Guiding Assistant: improved min-move recommendations
• Guide camera pixel scale is now shown in the new profile wizard and the stats window
• Added a button to reset camera gain to camera's default value
• Altair cameras: update to SDK version 30.13010.2018.0926
• Altair cameras: new option to use older SDK for 2015/2016 era cameras
• Altair cameras: prevent connecting to the wrong camera when reconnecting after a disconnect
• Lowpass2: insure guide pulse never goes in the wrong direction; more debug logging
• Fix glitchy display when changing profiles by clearing the displayed image
• New profile wizard: center the dialog on the screen, not on the gear dialog
• Windows: fix PHD2 crash when opening the mount setup dialog after the RPC server has been terminated
• Fix bug in ProfileWiz - camera properties were being displayed on AuxMount tab if camera was Simulator
• Ensure backlash compensation is enabled only when Dec guide mode is Auto
• INDI: fix problem connecting Aux Mount that does not provide guiding properties
• Event server: send calibration step events
• Updated Traditional Chinese Translation
• Help file: add help for too-little east/south moves in calibration; fix broken link re focusing with Star Profile tool

2.6.5dev5

• ZWO Cameras: fix a bug in 2.6.5dev4 that could prevent camera from connecting

2.6.5dev4

• Simplified Z filter settings interface
• Bookmarks are now persistent across PHD2 sessions
• ZWO cameras: update SDK to version v1.13.0821 (Window, Linux, Mac)
• ZWO cameras: provide an option to operate camera in 8-bit or 16-bit mode
• ZWO cameras: use camera model name to decide which camera to connect to
• SBIG cameras: do not rely on camera name to distinguish color vs mono
• More detailed tooltip for status bar calibration indicator
• Update the Flip Calibration menu item and tooltip to make it more explicit that it flips the calibration immediately
• Server interface: return an error response for an invalid JSON RPC request
• Server interface: fix invalid JSON message output for alert messages with embedded newline characters
• Windows: better Windows version reporting in the debug log
• Better handling of errors that occur during application startup
• INDI Aux Mount selection no longer excludes mounts that do not have the GUIDER interface
• New Profile Wizard: use an 'on-camera' mount if camera = 'simulator'; add warning dialog if selected gear has no pointing info
• Remove the None guide algorithm (aka Identity guide algorithm) selection
• Updated Traditional Chinese translation

2.6.5dev3

• Updated calibration settings window
• Calibration distance is now configurable
• New option to display mount corrections to scale on the graph
• New low-pass ZFilter guide algorithm (experimental)
• ZWO Cameras: use default gain setting reported by the driver (default gain was way too high)
• Guiding Assistant: fix problem with invalid min-move recommendations when GA is stopped and re-started
• Guiding Assistant: enforce minimum sampling time for making recommendations
• Remove unwanted check on guide rates when dec compensation is disabled
• Fix incorrect range checks on aggressiveness for Hysteresis and Resist Switch guide algorithms
• Log uploader: fix problem with log timestamps being garbled in some time zones
• Fix display of calibration graphs on Linux
• Fix problem with star profile not being displayed when search region is less than 15 pixels and star is close to the edge of the frame
• INDI: fix phd2 crash when another app sets the camera or mount Connected property to false
• event server: remove excessive debug log output when client is calling get_star_image
• Updated Traditional Chinese translation
• Help file updates

2.6.5dev2

• ZWO ASI Cameras: update SDK to v1.13.0523 (Windows) and v0.7.0503 (Linux & Mac)
• SBIG cameras: fix problem not recognizing multiple SBIG cameras
• SSAG cameras (Mac): fix possible crash after connecting camera and allow entering arbitrary USB VID/PID values for cameras with corrupted firmware
• PPEC: allow stopping/starting guiding without resetting the model
• Guiding Assistant: fix handling of very large backlash to always show recommendations
• Updated Traditional Chinese, French, and Russian translations
• Debug log improvements

2.6.5dev1

• More informative alert messages when runaway guiding is detected and for failed calibrations
• QHY cameras: update Windows SDK to V20180502_0 from QHY
• AO: remove irrelevant guide algo choices
• Update to wxWidgets 3.0.4
• Fix layout bug in BLC controls
• Minor debug logging improvements
• Lots of INDI improvements
  • INDI cameras: automatically de-bayer color cameras
  • do not allow overlapping RA and Dec guide pulses (overlaps can trigger a bug in some INDI drivers)
  • better logging including a verbose logging option
  • display the selected INDI devices in the Connect Equipment window
  • only show camera drivers in the camera selection list and mount drivers in the mount selection list
  • much better resilience to dropped connections from the INDI server
  • cancellable progress window for INDI device connection
  • fix INDI GUI excessive window updates by displaying the GUI after properties have been received from the server
• A bunch of help file updates
• Various improved tool-tip messages
• Updated Korean and Russian translations

2.6.5

• Backlash compensation improvements
• Updated Russian and Traditional Chinese translations
• Updated Russian Help File
• Server API enhancements (fix a potential crash when the client instructs PHD2 to shutdown; add methods for setting and allow clients to get the name of the current guide algorithm on each axis.)
• Improved logging of events in the Guide Log, like exposure duration changed and PPEC parameter changes

2.6.4dev10

• improved backlash compensation dynamic adjustment
• add additional control options for backlash compensation
• apply backlash comp for "fast recovery" moves after dithering
• apply backlash comp for AO mount bumps in declination
• simulator: fix lag in response to manual guide motions during long exposures
• Updated Traditional Chinese translation
• Updated Russian translation
• Updated Russian help file
• Windows: fix problem with log file uploader not seeing the full contents of the current session's logs
• log file uploader: fix layout of grid for non-English translations
• Polar drift tool: status line fix
• Polar drift tool: restore guiding on close

2.6.4dev9

• Add some new options for better control of backlash compensation
• fix a problem that prevented some cameras from automatically re-connecting after a disconnect
• ZWO cameras: update SDK versions to V0.7.0118 (Linux/Mac) and V1.13.1.12 (Windows)
• Updated Traditional Chinese translation
• Polar drift tool: re-enable guiding when done
• min motion controls allow changing with finer increments
• server: fix problem with receiving empty commands from some clients
• fix problem with graph sometimes displaying the correction incorrectly when the Predictive PEC guide algorithm is in use
• simulator minor improvements for changing settings on the fly

2.6.4dev8

• New tool to upload log files to openphdguiding.org
• Guiding Assistant: improved backlash test
• Altair cameras: updated SDK to version 20_12_2017
• Updated French translation
• Updated Help

2.6.4dev7

• fix bug introuced in 2.6.4dev6 causing a new equipment profile to replace an existing profile
• updated help file
• updated French translation
• fixed spacing in polar drift align window
• Guiding Assistant: correct for dec drift and show an uncertainty estimate

2.6.4dev6

• ZWO Cameras: update Windows SDK to V1.13.1.9
• SX Camera: fix pixel size value being reported incorrectly when square pixels option is enabled
• Updated Traditional Chinese translation
• Updated French translation
• Updated German translation
• Dither settling now ignores dec distance when dec guide mode is None
• Show help info in status bar as menu items are highlighted
• Drift align tool: fix problem with alignment circle sometimes following the guide star in Adjust mode when it is supposed to remain stationary
• Fix bug when guiding is initiated at the pole

2.6.4dev5

• New Polar drift tool - drift alignment using a star field near the pole
• Static Polar Align tool updates
• Better detection and handling of changes to mount guide speed and camera binning
• Improvements to New Profile Wizard
• INDI fixes
• Updated French and Traditional Chinese translations
• Updated help file

2.6.4dev4

• Star auto-selection no longer has 40-pixel edge distance restriction
• More explicit labeling of pixels vs arc-seconds units in graph window and stats window
• Remove modal dialog boxes from most camera connect functions
• Updated Traditional Chinese translation
• Updated French translation
• Static Polar Align tool improvements
• Add RA to guide log guide section heading

2.6.4dev3

• Static Polar Alignment tool improvements
• Atik cameras: binning support added
• Server API: new methods for sensor temperature and cooler status

2.6.4dev2

• Static Polar Align tool updates
• Add Static Polar Align and Drift Align tutorials to the Help file
• High resolution (4K) screen UI layout fixes
• Updated Traditional Chinese translation

2.6.4dev1

• New Static Polar Align tool that uses the center of rotation of a polar field to align on the pole.

2.6.4

• Fix bugs in calibration review and calibration sanity check when Dec guiding is disabled
• Update to latest ZWO ASI SDK

2.6.3dev8

• Altair cameras: update to new SDK version (2017-09-01)
• Updated French translation from Cyril
• Guide log: only show gain value when PHD2 is controlling the gain
• AO: better handling of step failures: show an alert and suggest new AO travel limit setting
• AO: fix bump instability when guide star is far from lock position
• AO: make sure calibration covers full travel range
• INDI fixes
• Updated Windows INDI client libs
• Do not allow invalid hysteresis setting (100%)
• Fix problem with server sometimes not restarting when PHD2 is restarted
• Allow cam simulator to simulate async ST4 guiding
• Do not tie up main UI thread for GPxxx and INDI mounts and AO moves
• Include milliseconds in FITS header timestamps
• Help file updates
• Debug log enhancements

2.6.3dev7

• Enable INDI support on Mac and Windows
• Disable Auto-select star when calibrating or guiding
• Updated French, Spanish and Traditional Chinese translations
• Help file updates
• Reset graph when gear profiles changes
• Event server: send a SettleBegin event when settling starts; added a new method to expose a single camera frame
• Windows: prevent windows firewall warning message after installing PHD2

2.6.3dev6

13 June 2017

• QHY cameras: fix incorrect guide directions when using On-camera (ST4) guiding
• Restart PHD2 automatically when language changes or when the Reset Configuration option is selected
• Help file updates
• New option to automatically check for software updates

2.6.3dev5

31 May 2017

• Updated Portuguese translation
• Windows installer - do not run the VC++ redistributable installer
• Fix text truncation with some translations in spctrograph slit position window
• Mac: fix crash when disconnecting GPUSB
• Adjust guiding parameters automatically when camera binning is changed
• PPEC: fix problem with min-move parameter not being honored
• Make sure not to retain calibration unless auto-load calibration is selected
• Display AO correction rate in AO graph window
• Help file updates
• Guard against too-small aggressiveness or hysteresis settings being entered
• Allow custom camera exposure duration selection

2.6.3dev4

29 April 2017 

• fix RA/Dec overlay when AO is in use
• server API additions to get calibration information and send guide pulses to scope
• improve Guiding Assistant text layout for some translations
• additional debug log output for the PPEC guide algorithm
• A new Portuguese (Brazilian) translation
• Default Gain for QHY cameras is now 40
• update QHY camera SDK to V7.4.16.4
• Update Altair SDK to latest 1.1.4 version to support new camera models
• fix crash when stats window is updated and Camera = None
• update ZWO Linux/Mac SDK to V0.6.0328
• don't allow Predictive PEC period value to be disrupted when the guiding assitant is run
• updated French translation

2.6.3dev3

10 April 2017

• updated translations
• more strict protection against windows being placed off-screen after screen resolution changes
• Predictive PEC settings UI improvements in Advanced Dialog
• Predictive PEC key settings added to Graph window
• additional information saved to FITS headers when saving an image
• QHY cameras: we now use an up-to-date QHY camera SDK for native support of QHY cameras on Windows, Mac, and Linux

2.6.3dev2

28 March 2017

• New Predictive PEC guide algorithm!
• Mac: fix problem with SX camera not being found
• camera gain setting should not allow value 0
• comet tracking: adjust RA shift rate for scope declination

2.6.3dev1

20 March 2017

• New image logging options based on trigger events, like star lost or large error offset
• Option to determine star saturation based on ADU value rather than star profile
• Improved detection of low-snr stars by more accurate background calculation
• Improved star mass change detection
• New option to reject stars below a minimum size (HFD)
• AO: fix bug with AO bump continuing after server received Pause command
• add more info to fits headers when saving images
• event server: add get_settling method