A simple answer, yes, you are bound by the paperwork you sign or accept benefit from whether you read it or understand it or not. It is your responsibility to read, understand and agree to documents that you sign, electronically sign or get benefit from as part of a group or relationship. My oldest son does a lot of work with Chase in court and he laughs about people going into court and claiming they did not know something that was on the paperwork they signed or benefited from. He says the judges usually give them a short lecture on wasting his or her time with people who do not read things.
The idea that you bought a gray market camera from a retailer and now want the full US warranty is almost sad. You are just trying to scam the camera manufacturer because you wanted to save a few bucks. There is a reason you can buy the cameras cheaper, they carry no US warranty. Get over it, you took the money and run with it now you have to pay the piper as it goes.
To all out there who think in this world of TOS driven warranties and user restrictions that you can claim I did not know and it is accepted are almost childish. It has never been a legal defense and many companies will work with you but they are not required to do so. Now carry that over into your personal life also. You sign it, you own it. People or companies may work with you but they have no obligation to do so. Some things you do can be criminal and they definitely will not work with you on that one. If you sign documents stating something, you are stuck with it no matter how you whine and cry about it or try to blame someone else. You are responsible for your own actions and signing and taking benefits from something is accepting that responsibility. It does not matter if it is lease, terms of service agreement, tax documents, discount allowances or other legal items. Case in point, a lady was arrested for bidding against her own items on eBay. It is called a shill. It carries a 5 year jail term with it.
Live with the items you have agree to do and life will be easier. If someone makes a deal with you, they do not have the right to change their minds on their own with compensating you. The deal is for TWO people or more and not just for the one’s benefit. They will tell you they can change their mind and they can, they just have to realize they then are responsible for “damages”. They will try to find a way out so do not let them. The same applies to you if you sign the documents or take the benefit from a deal. You made the deal, you live with it.
Disclaimer: I am not an attorney. These are my personal opinions and general information. These are not legal advice and should not be used as such.