SCTune
Precise SCT Collimation
Only for Mac
$2.99
Mac
Simple, intelligent SCT collimation and Bahtinov focusing for sharper stars.
SCTune is a Mac collimation assistant for Schmidt-Cassegrain telescopes that helps you evaluate and refine alignment using live visual overlays, manual adjustment tools, and clear feedback.
Whether you are working with a Tri-Bahtinov mask or a defocused star, SCTune gives you a practical way to compare the star pattern on screen, adjust the overlay, and judge collimation more confidently.
Features
Tri-Bahtinov mode
* Analyze spike-based collimation patterns with a dedicated workflow
* View automatic overlay guidance directly over the live image
* Manually refine the detected center and spike rays when needed
* Use a symmetric manual guide for visual comparison and fine adjustment
Normal Star mode
* Evaluate a defocused star using concentric guide circles
* Manually position the crosshair and circles over the diffraction pattern
* Adjust individual circle radius for more precise matching
* Calculate collimation error from the current ring placement
Flexible image sources
* Capture an external app window, including ASIAIR and other imaging apps on macOS
* Load saved test images for review and comparison
* Use a synthetic source for testing and learning the interface
Customizable overlays
* Adjust overlay opacity and line thickness for better visibility
* Change crosshair size for easier centering
* Position, rotate, scale, and customize the manual guide
* Zoom and reset the preview for closer inspection
Practical collimation tools
* Refresh detection on the current frame
* Auto-find the center when the overlay needs to be recalculated
* Snap the manual guide to the detected star position
* Review guidance, confidence, asymmetry, estimated magnitude, and other collimation data
SCTune is designed for observers and imagers who want a clearer, more interactive way to assess SCT collimation from live views or saved images.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Andrei Popovici, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrei Popovici
- Size
- 2.8 MB
- Category
- Utilities
- Compatibility
Requires macOS 26.0 or later.
- Mac
Requires macOS 26.0 or later.
- Mac
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Andrei Popovici
