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Beta Versions

The Beta program for SharpCap 3.1 is now running!

About SharpCap Beta

Be aware: Beta versions of SharpCap have had less testing than usual and may contain unfinished or experimental features.

If you choose to use a beta version of SharpCap, please test the cameras and functionality you intend to use before an observing session to avoid frustration and lost observing time. You can install a beta version of SharpCap without having to uninstall the previous release version, so it's easy to have both on the same machine and switch between them.

All beta versions have a built in time limit - they will only work up until a particular date (usually they have a life of a month or two). If your beta version runs out, check back at this page for an updated beta (or check the main downloads page for a new release). 

You can use most SharpCap Pro features that are new in this version during the beta period without a license.

NOTE: If your camera is not detected, you may need to install the SharpCap Pre-Requisites Installer. You only need to do this once, not for every new beta build.

SharpCap 3.1 Beta Downloads

Latest Version 
Download Version 3.1.4791.0
16 December 2017
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  •  Fix failure to check properly for updates in 4790
Older Versions 
Download Version 3.1.4790.0
15 December 2017
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  • Fix crash starting Altair 183C
  • Prevent the right mouse button panning the histogram graphs
  • Finer control on the histogram black/mid/white levels - drag sideways with the mouse above or below the graph to get slower movement
Download Version 3.1.4784.0
14 December 2017
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  •  Fix minor bugs
Download Version 3.1.4752.0
12 December 2017
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  • Hopefully a full fix for Windows Defender false positive issues - time will tell
Download Version 3.1.4740.0
12 December 2017
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  • Fix Windows Defender false positive problems
  • Minor bug fixes/tweaks
Download Version 3.1.4722.0
04 December 2017
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  • Add digital signatures to installer and application
  • Fetch updates over https for increased security
Download Version 3.1.4713.0
30 November 2017
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  •  Fix a couple of bugs with Smart Histogram

[Download removed due to Anti-Virus false positive issues]

Download Version 3.1.4710.0
29 November 2017
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  • Fix crash when switching between remote desktop and normal login while SharpCap running
  • Fix vertical flip on Celestron cameras in RGB mode
  • Do not restart camera on settings change unless ASCOM hardware altered
  • Fix smart histogram brain picking wrong unity gain when binning enabled on some cameras
  • Add more zoom percentages to the list
  • Fix GPS button (Plate Solve) not appearing if mount connected after camera start
  • Improvements and bug fixes to Feature Tracking
Download Version 3.1.4683.0
24 November 2017
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  • Fix crash when dragging the mini histogram to a different position in the control panel
Download Version 3.1.4682.0
21 November 2017
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  • Fix first live stacked frame not being saved when saving raw frames enbled
  • Potential fix for ZWO ASI120MM/MC cameras in 16 bit mode over USB2
  • Fix QHY10 cooling
  • Fix crash in focus score if focuser selected but connected check box not ticked
  • Other bug fixes
Download Version 3.1.4676.0
16 November 2017
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  • Better responsiveness of the Live Stack image to adjusting levels or colours
  • Colour balance sliders in live stack now based on an exponential formula: -100 means 2.7x reduced, +100 means 2.7x enhanced
  • Fix failure to snapshot after changing still format
  • Updated QHY SDK to 2017_11_09 version

(Note: 3.1.4671 showed a live stacking alignment bug when installed and has been replaced by 3.1.4676)

Download Version 3.1.4662.0
13 November 2017
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  • Add always-on mini histogram with level stretch to controls panel
  • Add colour balance adjustments to live stacking, improve histogram
  • Add Auto Stretch button to live stack and mini histogram (strength configurable in settings)
  • Various bug fixes
Download Version 3.1.4641.0
11 November 2017
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  • Improved level stretch in live stacking - just drag the black/mid/white point lines
  • Many bug fixes
Download Version 3.1.4619.0
06 November 2017
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  • Polar Alignment - do not show up/down/left/right guidance until final stage as following it at an earlier stage gives incorrect results
  • Polar Alignment - track each calculated center-of-rotation if you rotate slowly - should help pick up flexure problems if the dark red C-o-R crosses are not tightly grouped.
  • QHY cameras - fix issues with QHY10
  • Altair cameras - get sensor temperature into saved FITS files
Download Version 3.1.4608.0
02 November 2017
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  • New feature - auto save and restore of camera parameters. You can turn off in settings (permanent) or by holding CTRL when opening a camera (one time)
  • Add SharpCap version number to capture settings file
  • Updated Altair SDK to support new models and fix bugs
  • Updated QHY SDK to support new models and fix bugs
Download Version 3.1.4602.0
01 November 2017
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  • Measure how binning works during sensor analysis and incorporate it into histogram calculations
  • Fixes for QHY cameras that do not support Live mode
  • Improved algorithm for deciding which frames to show on screen from high speed cameras - preview should be smoother
  • Fix out of memory while adjusting histogram sliders in live stack
  • Support QHY 'GPS Slave' mode on 174GPS camera via scripting
  • Various bug fixes
  • Extend beta build time limit to end of November
Download Version 3.1.4570.0
28 October 2017
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  • Fix corrupted save of 32 bit stack when using Sigma Clipped live stacking
  • Fix saving raw frames while live stacking in all circumstances
  • New non-gamma stretch in display controls used for 8 bit frames too
  • Various bug fixes
Download Version 3.1.4561.0
24 October 2017
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  •  Display controls changed from brightness/gamma/contrast to black/mid/white points, better stretch function in 16 bit modes
  • Polar alignment improvements - track adjustment star to avoid switching between stars and better UI prompting
  • Various bug fixes and additional logging around ongoing issues
Download Version 3.1.4538.0
21 October 2017
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  • QHY Cameras - support cameras that cannot run in live mode
  • ZWO Cameras - update SDK to
  • ASCOM Hardware - option not to connect to hardware on camera startup
  • ASCOM Mounts - support mounts that cannot track (ie ST4 mounts)
  • Live Stacking - fix memory leaks and deadlocks
  • Dark Subtraction - improved hot pixel detection and removal
  • Dark Subtraction - remove darks that have been deleted from dropdown list
  • Sensor Analysis - try to fix autoexposure hunting up/down issue.
Download Version 3.1.4505.0
18 October 2017
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  • Templated filenames option in Live Stacking
  • Improved startup speed
  • Plate solving settings added
  • Altair cameras - updated SDK
  • Many bug fixes
Download Version 3.1.4477.0
15 October 2017
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Bug fixes, including
  • Fix crash in Feature Tracking in installed builds
  • Fix crash when swapping cameras with Smart Histogram brain showing
  • Disable smart histogram brain 'Apply' button when no solution
  • Improvements to Smart Histogram suggestions
Download Version 3.1.4460.0
12 October 2017
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Loads of new features including
  • Smart Histogram
  • Sensor Analysis
  • Feature Tracking
  • Seeing Monitor and Auto-Capture
  • Starlight Xpress Camera Support
  • Blind Plate Solving
  • Filename Templates
  • More efficient memory usage

Read More

Remember that installing the SharpCap 3.1 Beta will not uninstall SharpCap 3.0, so if you have any problems with the new version you can quickly switch back to the old version of SharpCap which will still be on your computer

 Download Version 3.1.4776.0
13 December 2017
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  • Smoother zooming of the preview (use CTRL+mouse wheel)
  • Scrolling of the preview (mouse wheel, use SHIFT for horizontal)
  • Reduced CPU consumption for high speed camera preview
  • Removal of old DirectShow option and SPC900 LXMOD support (sorry, casualty of the above improvements - use SharpCap 3.0)
  • Updated Altair SDK