Calibration Files ToupTek ATR 2600C
This astro camera utilizes the highly popular Sony IMX571 APC-S sensor . This specific sensor is famous for having zero amp glow , excellent linearity, and a highly stable, clean dark current when cooled.
Because of these characteristics, here is exactly how you should calibrate your camera:
Your Calibration Strategy: Darks, Flats, and Bias
Since your sensor does not suffer from amp glow and handles ultra-short exposures flawlessly, you should use Bias frames instead of Flat-Darks.
- Dark Frames: Highly Recommended. Even though the IMX571 has incredibly low noise, cooled dark frames will perfectly map out and subtract any hot pixels and remaining thermal noise.
- Flat Frames: Required. Essential for removing vignetting and any dust particles on your sensor window or sensor glass.
- Bias Frames: Recommended over Flat-Darks. Because the IMX571 lacks amp glow and handles ultra-short exposures perfectly, standard bias frames are ideal for calibrating your flat frames.
Recommended Capture Settings
| Frame Type | Exposure Time | Temperature | Gain / Offset | Lens Cap |
|---|---|---|---|---|
| Lights | Target dependent (e.g., 120s – 300s) | Set between -10°C to -20°C | Match your choice (e.g., Gain 100) | OFF |
| Darks | Match Lights exactly | Match Lights exactly | Match Lights exactly | ON |
| Flats | Tweak until histogram is at 30%–50% | Any (Cooling optional but preferred) | Match Lights exactly | OFF (Point at light panel) |
| Bias | Fastest possible (e.g., 1/4000s or 0.0001s) | Any (Cooling optional but preferred) | Match Lights exactly | ON |
Key Optimization Tips
- Pick a Temperature and Stick to It: The main benefit of your cooled ToupTek is repeatability. Set your cooling to -10°C (safe for both summer and winter) and leave it there.
- Build a Master Library: Because your camera is cooled, your thermal noise profile is perfectly predictable. You can shoot a library of Master Darks and Master Bias frames indoors once, and reuse them for 6 to 12 months without taking them in the field.