この明るさで絞りはどのくらいですか。

this (something or someone close to the speaker (including the speaker), or ideas expressed by the speaker)

bright; colourful; cheerful; familiar (with); knowledgeable (about); fair (e.g. politics); clean

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

to wring (towel, rag); to squeeze; to squeeze (fruit to extract juice); to press; to extract; to milk; to express milk; to rack (one's brains); to strain (one's voice); to extort; to exploit; to chew out; to reprimand severely; to rake over the coals; to give a sound scolding; to tell someone off; to scold; to rebuke; to drill into; to train; to narrow down (one's focus); to whittle down; to gather up (curtain, etc.); to tighten (drawstring); to stop down (lens); to turn down (e.g. radio); to bend (bow); to draw; to hold down; to constrict; to immobilize

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

which; what (way)

approximately; about; around; or so; to (about) the extent that; (almost) enough that; so ... that ...; at least; as ... as ...; like

be; is

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way