Colimamos el telescopio.

Colimamos is the first person plural (we) form of the verb colimar.

It can mean either:

• present indicative: we collimate / we are collimating
• preterite: we collimated

For many -ar verbs, the nosotros form is identical in the present and the preterite, so you need context to know which one is meant.

Examples:

• Ahora colimamos el telescopio. = present
• Ayer colimamos el telescopio. = preterite

Because Spanish often omits subject pronouns when the verb already shows who the subject is.

• Colimamos el telescopio. = We collimate(d) the telescope.
• Nosotros colimamos el telescopio. is also correct, but it sounds more emphatic, as if you want to stress we.

This is very normal in Spanish, including in Spain.

Spanish usually uses an article more often than English does.

Here, el telescopio means the telescope, referring to a specific telescope.
Without the article, telescopio would sound incomplete or unnatural in this sentence.

So:

• Colimamos el telescopio. = natural
• Colimamos telescopio. = not correct here

Yes, telescopio is a masculine noun, so it takes el in the singular:

• el telescopio
• los telescopios

Many nouns ending in -o are masculine, and telescopio follows that common pattern.

Because the personal a is generally used before a specific person (and sometimes a pet or personified being), not before things.

So:

• Vemos a María. = We see María.
• Colimamos el telescopio. = no a, because the telescope is an object, not a person

That is why a el telescopio would be wrong here.

Not really. Colimar is a technical/specialized verb, especially used in areas like:

• optics
• astronomy
• instrument adjustment

In everyday Spanish, people might more often use a broader verb such as:

• alinear = to align
• ajustar = to adjust

But if you are specifically talking about the technical process of collimating a telescope, colimar is exactly the right verb.

A Spain Spanish pronunciation would be approximately:

• colimamos → ko-lee-MA-mos
• el → el
• telescopio → te-les-KO-pyo

Stress:

• co-li-MA-mos
• te-les-KO-pio

A rough full pronunciation: ko-lee-MA-mos el te-les-KO-pyo

A couple of useful notes:

• c before o sounds like k
• ll does not appear here, so there is no special Spain/ll issue in this sentence

Yes, but Colimamos el telescopio is the most neutral and natural order.

This is basically:

• [verb] + [direct object]

Since the subject we is already contained in colimamos, Spanish does not need to state it.

Other orders are possible for emphasis, for example:

• Nosotros colimamos el telescopio. → stresses we
• El telescopio lo colimamos nosotros. → marked/emphatic, not the neutral version

So the given sentence is the normal, straightforward way to say it.