All 3 Uses

candid
in
The Blind Assassin
(Edited)

Or this is what is said of him in The Chase Industries: A History, a book my grandfather commissioned in 1903 and had privately printed, in green leather covers, with not only the title but his own candid, heavy signature embossed on the front in gold.
p. 54.6 *

candid = natural (not made in a special way for appearance's sake)
A lifting of both eyebrows, the candid, transparent stare of a double agent.
p. 260.5 *

candid = honest and direct
These flakes, it says in candid lettering the colours of lollipops, of fleecy cotton jogging suits, are not made from corrupt, overly commercial corn and wheat, but from little-known grains with hard-to-pronounce names — archaic, mystical.
p. 365.3

Definitions:

(1) (candid as in: your candid opinion)
honest and direct
(2) (candid as in: a candid photograph)
unposed -- typically said of a photograph
(3) (meaning too rare to warrant focus)