That is correct. CMOS cameras from QHY and ZWO are already "broad spectrum," meaning that they can capture light in all wavelengths of the visible spectrum. This is in contrast to DSLRs, which have a built-in filter that blocks out some of the light in the red and infrared wavelengths. This filter is necessary for daylight photography, but it can be a detriment for astrophotography.
Because CMOS cameras from QHY and ZWO are already broad spectrum, they do not need to be modded like DSLRs. This can save you time and money, as well as the risk of damaging your camera.
However, it is important to note that not all CMOS cameras are broad spectrum. Some cameras, such as those used for industrial or medical imaging, may have filters that block out certain wavelengths of light. It is important to check the specifications of your camera to make sure that it is broad spectrum before using it for astrophotography.
Here are some additional benefits of using CMOS cameras from QHY and ZWO for astrophotography:
They have higher quantum efficiency than DSLRs, meaning that they can capture more light.
They have lower noise than DSLRs, meaning that your images will be cleaner and sharper.
They have a wider dynamic range than DSLRs, meaning that you can capture more detail in both the bright and dark areas of your images.
They are more sensitive to light than DSLRs, meaning that you can take longer exposures without getting star trails.
If you are serious about astrophotography, I would recommend using a CMOS camera from QHY or ZWO. They are a great investment for astrophotographers of all levels. VidMate