A rekesz kicsi, és a fényérzékenység nagy.

In Hungarian, the verb to be is usually left out in the present tense, third person when you are saying something like X is Y.

So:

• A rekesz kicsi. = The aperture is small.
• A fényérzékenység nagy. = The light sensitivity is high.

If you wanted I am, you are, we are, etc., Hungarian normally does use forms of lenni:

• Kicsi vagyok. = I am small.
• Kicsi vagy. = You are small.

But in the present tense, third person singular/plural, it is usually omitted:

• ő kicsi = he/she is small
• ők kicsik = they are small

So the sentence is completely normal without van.

Because Hungarian a/az means the, not a/an.

• a = the (before most consonant sounds)
• az = the (before vowel sounds)

Examples:

• a rekesz = the aperture
• az ablak = the window

The English indefinite article a/an is usually translated by egy in Hungarian:

• egy rekesz = an aperture / one aperture

So in your sentence, A rekesz means The aperture, and a fényérzékenység means the light sensitivity.

Hungarian normally repeats the definite article with each noun phrase, just as English often does.

So:

• A rekesz kicsi, és a fényérzékenység nagy.

literally has:

• The aperture [is] small, and the light sensitivity [is] high.

You do not normally omit the second a here. Repeating it sounds natural and grammatical.

Rekesz has several meanings depending on context, but in photography it commonly means aperture.

In other contexts, it can also refer to things like a compartment, section, or partition. Hungarian words often have a broader range of meanings than a single English translation.

So here, because the sentence is clearly about photography or camera settings, rekesz is best understood as aperture.

It is a compound noun, which is very common in Hungarian.

You can break it down like this:

• fény = light
• érzékeny = sensitive
• -ség = a suffix that turns an adjective into an abstract noun, similar to -ness or -ity

So:

• érzékeny = sensitive
• érzékenység = sensitivity
• fényérzékenység = light sensitivity

Hungarian often builds precise meanings by combining words and suffixes into one longer word.

Because kicsi is not directly modifying the noun inside the noun phrase here; it is the predicate adjective.

Compare:

• a kicsi rekesz = the small aperture
  Here kicsi comes before the noun because it directly describes it inside the noun phrase.

• a rekesz kicsi = the aperture is small
  Here kicsi comes after the noun because it is the thing being said about the noun.

The same applies to:

• a nagy fényérzékenység = the high sensitivity
• a fényérzékenység nagy = the sensitivity is high

Yes, nagy often means big or large, but like many common adjectives, it has a wider range of uses.

In Hungarian, nagy can also correspond to English high, great, or strong, depending on context.

So:

• nagy ház = big house
• nagy sebesség = high speed
• nagy nyomás = high pressure
• nagy fényérzékenység = high sensitivity

This is very normal usage. Hungarian does not always match English adjective choices one-to-one.

Usually, nagy is the natural choice here.

Both nagy and magas can sometimes relate to the English idea of high, but they are used differently:

• magas usually means tall or high in a vertical sense

  • magas ember = a tall person
  • magas fal = a high wall

• nagy is often used for degree, amount, intensity, or size

  • nagy sebesség = high speed
  • nagy hőmérséklet in some contexts, though magas hőmérséklet is also common
  • nagy fényérzékenység = high sensitivity

So for sensitivity, nagy is the safer and more idiomatic choice in this sentence.

Yes, és is the normal Hungarian word for and.

So:

• A rekesz kicsi, és a fényérzékenység nagy.
• The aperture is small, and the sensitivity is high.

It works very much like English and in simple coordination.

One small stylistic point: Hungarian often uses commas a bit differently from English in some sentence types, but in a sentence like this, the comma before és is perfectly normal.

Because in this sentence they are predicate adjectives in the singular, and Hungarian adjectives do not need special endings here.

• a rekesz kicsi
• a fényérzékenység nagy

If the noun is plural and the adjective is also used predicatively, Hungarian often makes the adjective plural too:

• A rekeszek kicsik. = The apertures are small.

But in the singular, the basic dictionary form is used:

• kicsi
• nagy

So there is nothing missing; this is the standard form.

A rough guide is:

fény-ér-zé-ke-nyi-shég

A few helpful pronunciation notes:

• é is a long vowel, roughly like ay in say, but held longer and without the English glide.
• ny is like the ny in canyon.
• s in Hungarian is pronounced like English sh.
• sz would be English s, but that letter combination does not appear in this word.

So -ség sounds roughly like shayg or shehg, depending on how closely you aim for Hungarian vowel quality.

The stress in Hungarian is always on the first syllable, so:

FÉNY-ér-zé-ke-nyi-ség

Yes, Hungarian word order is flexible, but changes in word order often change focus or emphasis.

The neutral version here is:

• A rekesz kicsi, és a fényérzékenység nagy.

If you move words around, it may sound marked or emphasize a contrast:

• Kicsi a rekesz, és nagy a fényérzékenység.

This is also correct, but it can sound more like you are highlighting those qualities: The aperture is small, and the sensitivity is high.

So both are possible, but the original sentence is a straightforward, neutral way to say it.

No, but it is a very common and natural one.

Hungarian also has kis, which learners often notice quickly. The difference is important:

• kis is usually used before a noun:

  • kis rekesz = small aperture

• kicsi is commonly used predicatively or on its own:

  • A rekesz kicsi. = The aperture is small.

In everyday Hungarian, kicsi can also sometimes appear before a noun, but for learners, the safest pattern is:

• kis + noun
• noun + kicsi

So this sentence uses the very natural predicate form kicsi.