'Wedding commission' = being booked as the photographer for particular a wedding.
"commission" can have several meanings but in this context it means something to be done by one person on behalf of another. Thus you commission an artist to paint a picture or a photographer to take a photo
Confused of Malvern
'The greatest fool can ask more than the wisest man can answer'
|Al Fateh Grand Mosque by mallen1976|
from Your City - B&W Night Picture
|Fascia walkie talkie building London by ian herridge|
from Abstract Architecture
|Beakable by Hobbyfotograaf|
|St Paul's - DT NYC by mollymcd|
from Modern - Old-Fashioned