Single or small number of words opposite of "soft focus", "rose-tinted glasses" etc to convey cynicism/critical thinking/realism but not "pessimistic"

I'm looking for a single word or small number of words to convey something like "Life through a _____ filter/lens" where the opposite is 'soft-focus', 'rose-tinted' etc.

Where _____ conveys a sense of gritty realism, critical thinking or getting to the root or 'principle' of things, but not necessarily being "pessimistic".

For example when you take a photo using a "soft focus" technique it blurs out a lot of the details, can hide unfortunate features in the original picture, etc.

I did check this possibly related question and I love the idea of looking at the world through "half-empty glasses"! - but that question is about being pessimistic rather than 'just' realistic or thinking critically etc. I'm not looking through "half-empty glasses"; I'm looking through glasses that don't actually change the view in any way, but realising the nature of what I'm actually looking at.

Clear-eyed means:

having a shrewd understanding and no illusions.
"clear-eyed about human nature"

from Google

And a sample sentence from Collins

In the way they approach engineering, they have learnt to put emotions to one side and to look in a clear-eyed way at the evidence.

You could say "clear-eyed lens" if you wanted.