Do you need Dive Housing for GoPro?
Yes. All of the Session models are waterproof out of the box without the need for an external housing. They’re rated down to 33 feet (10 meters). In fact, the HERO4 Session was the first GoPro to be waterproof without an external housing.
Does a GoPro 4 need a waterproof case?
No. These cameras are NOT waterproof without a housing. Each of the HERO4 cameras come with the Standard Housing that is capable of withstanding depths of up to 131 feet (40 meters).

Should I use a waterproof case for GoPro?
But since the HERO5 (or, more accurately, the Session), GoPro cameras have switched to having the camera body itself being waterproof. So for many situations in and around water, you no longer need to have a separate waterproof housing, as you did for the HERO4 models and earlier.
How deep can a GoPro go underwater?
If you need to dive deeper, you will want to use the Protective Housing. MAX is waterproof down to 5m (16ft) without a housing; just ensure that the camera door is closed prior to exposing MAX to liquid. HERO8 Black is waterproof to 33ft (10m) with the door closed. You won’t need additional housing before diving in.

Is GoPro waterproof without lens cover?
The lens protector is to stop the lens itself from getting broken or scratched. Without it, your camera is still waterproof down to 33ft (10m).
How deep can GoPro 4 go underwater?
HERO4 and HERO3+ (including sub-models): All of these cameras do come with the Standard Housing that is capable of withstanding depths of up to 131 feet (40 meters). If you are using the Dive Housing, it is waterproof to 197′ (60 meters).
What GoPro is best for diving?
If you decide that you absolutely need 4K recording underwater, then either the GoPro Hero 7 or 8 is camera for you. They offer 4K in both 4:3 and 16:9 aspect ratios. For underwater use I would recommend using the 4K at 60 fps with an aspect ratio of 16:9 and hypersmooth image stabilization.