A Practical Solution When a Known Good Reference Camera Is Not Available

For the most accurate CMOS calibration, it’s ideal to use a working camera of the same model — preferably one that is brand new or has never been repaired and is known to function correctly.

But sometimes, you don’t have access to a known good camera — especially when working with used gear, salvaged parts, or equipment that’s already been repaired. In these cases, being able to create a Demo-based compensation file allows you to move forward with CMOS calibration, even without the ideal setup.

What Is the Demo File?

The Demo feature creates a simulated compensation file using ideal values — as if you were using a perfectly calibrated light source and a standard EF 50mm F1.8 STM lens. While not as precise as a real-world calibration, this method usually gives better results than the generic calibration stored on a replacement main board.

How to Create a Compensation File Using Demo

1. Close the SPT software completely and then reopen it.
2. In the first window that appears, click ‘Demo’.
3. Go to the Plugins tab and select CMOS Calibration.
4. Under the Lightbox/Lens Compensation tab, follow the steps—this mostly involves clicking ‘Start’ several times.
5. When prompted, save the compensation file.

Using the Demo File for CMOS Calibration

When you use this file for CMOS calibration, the SPT software will detect that it's a Demo file and ask you to confirm before proceeding. This is just a safeguard to make sure you understand that it’s not as precise as calibration with a real camera.

Return to EOS R CMOS Plugin

Return to the EOS RP CMOS Plugin

Solve Hard-to-Diagnose Temperature Related Problems

With the Temperature Plugin, you can:

1. Check and Test Key Sensors; on the Shutter, Main Board, CMOS and TFT Display.
2. Eliminate guesswork when diagnosing temperature sensor issues.
3. Quickly identify the source of temperature-related problems.
4. Save time and minimize frustration during repairs.

Here are a few temperature-related issues

• Soft focus on hot days – Caused by changes in Lens Flange/CMOS distance.
• Random overexposure or underexposure – Due to fluctuations in AE current.
• Dark images at high shutter speeds – Resulting from Shutter temperature changes.
• Flash malfunctions – Triggered by temperature shifts in the EF unit.

When it comes to support, we know how frustrating it can be to search for answers and still come up empty.  With most software, you end up spending more time navigating complex, jargon-filled help pages than actually solving your issue.

That is why we designed our Help to be Different!

Our Help is linked directly to the section you are working in!