How to Use Flat Shoot on Seestar
This tutorial will guide you through capturing flat-field frames and completing flat-field calibration for your Seestar astronomical camera.
Flat-field calibration effectively fixes common optical issues including uneven illumination, sensor dust marks and vignetting. There are two practical methods to capture standard flat frames with Seestar:
- Electronic Flat Field Method
- Sky Flat technique
Common Steps for Both Methods
First, open the Seestar App, connect your Seestar telescope. Go to Settings → Advanced Feature.
On the Advanced Features page, tap Image Calibration, then select Flat Shoot.
On the Flat Shoot screen, slide the directional control at the bottom to tilt the lens vertically upward.
Method 1: Sky Flat Technique
This method is recommended for daytime use.Cover the lens with a sheet of A4 paper.
Method 2：Electronic Flat Field Method
This method works with iPads or dedicated flat-field panels. Set the display to a pure white background and adjust brightness to around 80%. Place the light-emitting device evenly over the lens.
After preparation, tap the Shoot button on the right. Seestar will automatically start capturing flat frames.
The system will notify you if the capture is successful. If it fails, follow the prompts to retry.
Notes & Tips:
- Ensure the lens and covering material (A4 paper or display device) are free of wrinkles or shadows.
- Make sure the light source is evenly distributed, otherwise flat calibration may be inaccurate and affect the final image quality.