kannai no satuei ha kanou desu.

館内 is a compound noun:

• 館 = building, hall, facility, museum, etc.
• 内 = inside, within

So 館内 literally means inside the facility/building or on the premises.

It is a common word on signs and notices. Depending on context, it could mean:

• inside the museum
• inside the hall
• inside the building
• within the facility

Here, の connects two nouns:

• 館内 = inside the building/facility
• 撮影 = photography / filming

So 館内の撮影 literally means something like:

• photography in the building
• on-premises photography

This の works a bit like of or a noun-linker in English, but the most natural translation usually depends on context.

は marks the topic of the sentence.

So:

• 館内の撮影は = as for photography inside the facility...

Then the sentence says something about that topic:

• 可能です = is possible / is permitted

This structure is very common in Japanese:

• X は Y です
  = As for X, it is Y

So the sentence is basically:

• As for photography inside the facility, it is allowed/possible.

Japanese does not always need a verb in the same way English does.

Here, the sentence uses:

• 可能 = possible
• です = polite copula

So 可能です means is possible or is permitted.

The whole sentence is a noun-based statement rather than a full verb phrase like you can take photos.

A very literal breakdown is:

• 館内の撮影は可能です
• Photography inside the facility is possible.

That sounds a little stiff in English, but it is perfectly natural in Japanese, especially in formal writing or signage.

Grammatically, 可能です means is possible.

But in signs, rules, and notices, it often implies permission rather than physical ability. So in this sentence, the natural meaning is usually:

• Photography is allowed inside
• You may take photos inside the facility

In other words, the literal meaning is possible, but the practical meaning is often permitted.

撮影 is a formal noun meaning photography or filming/shooting.

It is broader than just taking still photos. Depending on context, it can include:

• taking photographs
• filming video
• image recording in general

That makes it useful for signs and official notices.

Compared with other words:

• 写真 = photo / photograph
• 写真を撮る = to take a photo
• 撮影 = photography / filming / shooting

So 撮影 sounds more formal and rule-like, which fits a posted notice well.

Yes. 館内での撮影は可能です is also very natural, and in some contexts it is more explicit.

Compare:

• 館内の撮影
• 館内での撮影

The second version makes the location relationship clearer because で marks the place where an action happens.

So:

• 館内での撮影 = photography done inside the facility

By contrast, 館内の撮影 is slightly more compact and sign-like. In short notices, Japanese often uses a compressed style.

Because this kind of phrasing is extremely common in signs, announcements, and official notices.

Features that make it sound formal:

• use of 撮影 instead of a casual verb phrase
• use of 可能です instead of something more conversational
• compact noun-heavy structure

A more conversational way to say something similar might be:

• 館内で写真を撮れます。
• 館内で撮影できます。

These feel more like something a person would say in conversation.
館内の撮影は可能です sounds more like posted information.

The plain-form version is:

• 館内の撮影は可能だ。

But in practice, 可能だ can sound quite blunt, stiff, or written.
For signs and polite communication, 可能です is much more common.

You may also see even shorter sign language such as:

• 館内撮影可 = photography permitted inside
• 撮影可 = photography allowed

Usually は is the more natural choice here because the sentence is presenting 館内の撮影 as the topic.

• 館内の撮影は可能です
  = As for photography inside the facility, it is allowed.

If you used が, it would sound more like identifying or emphasizing the subject in a different way, and it is less natural for a simple rule/notice in this context.

For signs and general statements of permission, は is the standard choice.

It is pronounced:

かんない の さつえい は かのう です

Romanization: kannai no satsuei wa kanou desu

A few notes:

• 館内 = かんない
• 撮影 = さつえい
• は is written ha but pronounced wa here because it is the topic particle
• 可能 = かのう

Because it uses 撮影, it can potentially include both still photography and video recording.

Exactly what it covers depends on the place and the rules. In many contexts:

• 撮影可 or 撮影は可能です can mean both photos and video are allowed

But sometimes a facility may still have separate rules, such as:

• photos allowed, video not allowed
• no flash
• no tripod
• no filming in certain areas

So 撮影 is broad, but the exact scope depends on the situation.

可能 is a noun-like word that often behaves like a na-adjective in Japanese grammar.

That is why it can be used like this:

• 可能です = is possible
• 可能な場合 = a possible case
• 撮影が可能です = photography is possible

So even though it translates like the English adjective possible, in Japanese its behavior is a little different from a typical English adjective.