QHY168C45. Adjust the offset. When you block the light thoroughly, you may find that the image is notreally "zero" (entirely black). Sometimes this will lower the quality of image contrast. You canadjust the offset to make the histogram peak close to zero in order to get a betterbackground. You can open the histogram to confirm that.QHY168C is a color camera, so it is very important to set the offset to a low value and makethe histogram peak close to zero. Because the color camera color balance is to multiply aratio to the pixel value in the FPGA. The bias will be multiplied too and it may affect the colorbalance.6. If you want to try 16bit image, you can switch the Colour Space to "RAW16".7. By check the "LX" mode you can expand the exposure setting range and take long exposureshot. QHY168C camera has the anti-amp light control circuit and it can reduce the amplifierglow significantly. For more information about its anti-amp light control function, pleasecheck its corresponding webpage.