1, if it is adjusted later, it is best to use the raw format. Photos can be taken in jpg format and raw format. JPG means that the camera has been processed and there is not much room for adjustment on the computer. RAW is all the data recorded at that time. You can adjust any white balance and exposure.

2. For the wedding, you can use AV files. Generally, the aperture is the largest, and then when indoors, the ISO can be adjusted to around 800, so that the shutter speed is sufficient and will not be blurred.