The k-x is a great camera for wedding photography so I would not fret about it. As northcoastgreg said, You might be better served with a FA lens unless you are really good at manual focusing. I don’t use my M lenses when shooting weddings, however when I am not getting paid I usually have an M lens on my camera. I feel it really helps me with improving my composition and getting used to shooting in manual. Something to think about
Budget $2,500
System Canon
(Full Frame)
1 5D Mark II $2,499
Canon Total $2,499
Too bad… No money left for a lens
System Pentax
1 K-x $450
Sigma 18-50 2.8 $425
Pentax FA 50 1.4 $325
Pentax DA* 50-135 2.8 $800
Pentax Total $2000
And you now have $500 to put forth towards that Limited lens you always wanted.
With that said, my wife has a Canon 5D mark II and I shoot with a K-x and k20d. I will probably be getting the Canon 5D mark III for myself when it comes out. However, the k-x is perfectly capable tool for weddings. If it was not for the Pentax system there is no way I could have afforded to get into wedding photography.
Captivated Studio | Grand Junction | Telluride Wedding Photographer