Sy maak die foto skerp deur die lens te verstel.

A word-for-word breakdown is:

• Sy = she
• maak = makes
• die = the
• foto = photo / picture
• skerp = sharp / in focus
• deur = by / through
• die lens = the lens
• te verstel = to adjust / adjusting

So the full sentence means something like:

She makes the photo sharp by adjusting the lens.

Because Sy is the subject pronoun: the person doing the action.

• Sy maak ... = She makes ...

Haar is usually the object form, like her in English.

• Ek sien haar = I see her

So in this sentence, the woman is doing the action, so Afrikaans uses Sy.

This is a very common Afrikaans pattern:

• maak + object + adjective

It means make something become X.

So:

• maak die foto skerp = make the photo sharp
• more natural English: bring the photo into focus

Other examples:

• Hy maak die deur oop = He opens the door
  literally: He makes the door open
• Sy maak dit skoon = She makes it clean / cleans it

So maak ... skerp is a normal way to express sharpen/focus something.

Because skerp is describing the photo, not the way she performs the action.

In other words:

• die foto is becoming skerp
• so skerp is an adjective

The structure is:

• maak
  • object
    • adjective

So it is not She does it sharply. It is She makes the photo sharp.

Because both foto and lens are definite nouns:

• die foto = the photo
• die lens = the lens

Afrikaans uses die as the definite article for all genders and for both singular and plural in most everyday cases.

So unlike languages that change the depending on gender, Afrikaans keeps it simple:

• die man = the man
• die vrou = the woman
• die kind = the child
• die fotos = the photos

Yes, deur often means through, but it can also mean by means of or by.

In this sentence:

• deur die lens te verstel = by adjusting the lens

So deur introduces the method or means used to do something.

Compare:

• Hy loop deur die deur = He walks through the door
• Sy leer deur te lees = She learns by reading

Same word, different but related use.

Te is the usual infinitive marker in Afrikaans, similar to English to in many cases.

So:

• verstel = adjust
• te verstel = to adjust / adjusting

After deur, Afrikaans commonly uses this pattern:

• deur + noun/object + te + infinitive

So:

• deur die lens te verstel = by adjusting the lens

A few more examples:

• deur hard te werk = by working hard
• deur die boek te lees = by reading the book

In Afrikaans infinitive structures with te, the main verb usually comes later, often after its object.

So the normal order is:

• deur
  • object/complements + te
    • verb

That gives:

• deur die lens te verstel

This is very natural in Afrikaans. English often puts the verb earlier, but Afrikaans tends to place the infinitive verb toward the end of that little phrase.

You can think of it as:

• by the lens to adjust
  which sounds odd in English, but is normal in Afrikaans grammar.

Verstel means adjust, set, or alter the setting of something.

In this sentence, it refers to adjusting the lens so the photo becomes sharp or focused.

Depending on context, verstel can be used for many kinds of adjustment:

• a lens
• a camera setting
• a mirror
• a machine
• a clock

So here it is a good practical verb for adjusting the lens.

In everyday Afrikaans, foto usually means photo / photograph, but in many contexts English speakers might naturally translate it as picture.

So:

• die foto is skerp could be translated as
  • the photo is sharp
  • or more naturally in some contexts, the picture is clear/in focus

The exact English wording depends on context, but foto itself is specifically photo.

Yes. A very literal translation is:

• She makes the photo sharp by adjusting the lens.

But more natural English might be:

• She brings the photo into focus by adjusting the lens.
• She focuses the image by adjusting the lens.
• She sharpens the photo by adjusting the lens.

The Afrikaans sentence itself is completely natural, even if the most literal English version sounds slightly less natural than the alternatives above.