Regarding 'woman photographer' or 'female photographer' ...
There are no adjectives here. Each phrase is a compound noun.
While we are way off topic: no, the compound noun "woman photographer" would traditionally mean one who photographs women, as with "landscape photographer" and such. Try replacing "woman" by "man" to see how unorthodox this usage is -- but nevertheless it has become somewhat common to use "woman" as an adjective, notwithstanding the failure of many dictionaries to report this newfangled usage.
Back on topic: I too prefer viewing images with a mid-gray to black background, but am resigned to the overall preference for black text on white. Maybe photographs on the site should be surrounded with nice big black borders?
P. S. Should I complain about using apostrophes ['] where quotes ["] are called for, as if to avoid reaching for the shift key?