Are DSLR cameras permitted in NY & DC tourist attractions?

Most museums prohibit flash photography; which is the basis of the camera ban.

For example, the MoMA PS1 has this to say:

Photography is allowed in the museum. Visitors can use small cameras and cellphone cameras. Flash photography, videography, tripods, and photography for professional purposes are not allowed.

Here is the justification from MoMA PS1 Director Klaus Biesenbach for this change (previously, cameras were strictly forbidden):

Cameras are ubiquitous in daily life because of cell phones and other devices. More pictures are taken than are on display. Today, taking pictures is a participatory way of visiting exhibitions, and we embrace this creative and proactive viewing practice.

Source: Hyperallergic

Keep in mind that most of these artworks are kept under strict atmospheric conditions (including the type and intensity of light and the amount of moisture in the air, among others) and photography can easily ruin these priceless works.

Not to mention, a bunch of clacking of the shutter is really distracting. Again, I have to stress the entire no-flash issue.

Although a large majority of the works on display are in the public domain (so there are no copyright issues) but they may be under other restriction for reproduction.

I will add my personal experience in D.C.

• Anywhere you can be, non-flash photography is fine. There may be exceptions but I never saw them. You can take a non flash photo anywhere. There are restrictions on rather the photo is for publication, sale, or personal use, but for a normal person, taking a non-flash photo is fine.

• Outdoor exhibits and monuments, flash photography is allowed.

• Indoor exhibits and items, tripods, mono-pods, selfie sticks, or anything else that keeps you from holding the camera to take the picture are banned. Using them may get you ejected from the exhibit. The reason is that it takes up space and slows everyone down.

• Outdoor exhibits and items, most of the time, if you set up a tripod "out of the way" then it's fine. If you set up a tripod in the middle of the line, you will be asked to leave. I don't remember any exhibits or monuments where this was actually an issue, but the general rule is don't block the path.

What happens if you don't follow the rules is pretty varied. At most exhibits they just ask you to turn the flash off. At some they may escort you out. At a very few you could be arrested. At all of them in D.C. there will be armed security guards watching over the more valuable exhibits making sure you follow the rules (among other things of course). They are usually friendly and understanding. If they ask you to put away the camera, or to keep moving just do it and move on. Thousands of people a day come see the exhibits in DC, and rarely is anyone arrested or anything like that.

Most of these rules exist to protect the exhibit, as it would be harmed by the light of the flash, or to protect the people, 1 idiot setting up a tripod wrong could endanger 100 people in line (or at least slow them down). Usually the staff, guards, curators, and anyone else will go out of their way to make sure everybody has a chance to see the exhibit, and get what the want from it. In some circumstances if you tell them you want a picture and are having a hard time getting it, they will assist you in taking the picture, or make arrangements for you to come back when it's less busy.

In the US, the legal presumption is that you have the right to take a photograph anywhere you have the legal right to physically be.

In a practical sense, what that means any place owned by any level of government -- public museums, parks, city streets -- you can take pictures. In a private facility, the owner can impose pretty much any restriction he wants, but as a practical matter, private tourist attractions aren't going to want to scare off customers.

A big issue is places with a lot of copyrighted material: art museums, amusement parks, and movie theaters.

Art museums generally trust visitors to take pictures, on the assumption that the photographs will be of too low a quality to affect the value of the art.

Amusement parks are built around photography, so they would never interfere.

Movie theaters, of course, vindictively clamp down on any sort of recording. Make a video recording of a movie and you're doing time.

In certain very sensitive government-owned areas -- around nuclear power plants, for example, and in courtrooms -- photography is restricted for security reasons. Notices will be posted, extremely prominently.