Check out these photo effects images:
White and Black
Image by fs999
Pentax K-5 • 800 ISO • Pentax DA* 55mm f:1.4 SDM
Heliopan 780 infrared filter
White/green lily and black/red cala
Desaturated in PaintShop Photo Pro X3 Ultimate
Snowy Fence
Image by fs999
Pentax K-5 • Pentax DA 21mm F3.2 AL Limited
Fx: Colorisation
Walferdange • Luxembourg
Blue Light
Image by coreycam
Photo 14/365 in my 2010 project.