With the advent of color lithography in the 1870's, giveaway trade cards became a popular means to advertise all kinds of goods. Often the image on the front of the card bore no relation to the product advertised on the back. Cards showing women with cameras are exceptionally rare and I have yet to see one actually advertising photographic services.
Albertiny Pate, Nice, France
Bon Genie
Paris, France
Poole Piano Company
Boston, Massachusetts
White Sewing Machine
Cleveland, Ohio
The advertisements on the backs of trade cards don't necessarily match the picture on the front. But in this case, the little cowgirl might be modeling an example of "the highest novelties in goods for ladies wear."