The common rule is to never put anything valuable in your luggage. No cameras, no electronics, etc.
The maximum you are typically insured for by the airline is defined in an decades old international agreement as $ 20 / pound. That barely covers simple clothing; but obviously airlines have little interest in increasing that, and understandably so, as it is very easy to make false claims. Your airline might have a higher amount, but don't hold your breath.
If you paid with your credit card, you might have additional insurance, and that might well cover it - depending on the credit card, limits are nothing, some thousand dollar, or even a lot more (for those high-end cards that cost $500 / year).
However, electronis, cameras, etc. are often excluded explicitly.
So 1. file a claim with the airline; 2. contact your credit card company about the remainder (after the airline paid something or nothing). 3. Learn from it: Nothing valuable in the lugagge.