Each RGB filter transmits different amounts of light: red and green filters usually allow more light than blue. Using the same exposure time across all three can lead to noisy blue channels or overexposed red channels.
To fix this, test your target by taking short exposures through each filter and adjust times to achieve balanced brightness. This approach reduces noise and ensures your final image has natural, vibrant colors.
Remember, consistent ISO and focus settings across all filters are also crucial for smooth color blending.
