If you're getting blurry images from your Raspberry Pi High Quality Camera it's usually related to the lens adapter ring or the focus section of the lens.
Some lenses like the 6mm lens require the camera adapter ring to be removed, otherwise the lens will be at an incorrect distance from the sensor and will not function as designed.
If blurry, check your lens spec and try with and without the adapter ring
You may also need to turn the focus section of any attached lens a number of times to bring the lens into focus.
Always remember: - the HQ Camera needs a lens to function properly. Without a lens, no image will be produced!