Finding the right camera settings is really easy if you have a background in photography, and it will take a less than minute to set your camera exposure triangle for your lighting scenario. 

Even if you don’t have experience with photography, it is not a big hassle – you can use the scripts called “DSLR Exposure (EV-LV Method)” made by Mohammadreza Mohseni to help you set your camera. 

The script supports the Corona Camera Modifier, as well as other camera types. Note: if your priority is DOF, use AV mode; if your priority is Motion Blur, use TV mode. 

The script is available under this link: https://cgtricks.com/maxscripts-dslr-exposure-ev-lv-method-mohammadreza-mohseni/