A few nice digital photos images I found:
Green Center
Image by fs999
Pentax K-7 • Pentax DA* 200mm f:2.8 ED SDM
Hoya Pro1 Digital Filter Close-Up N°3
Dörr Combi TTL Macro Flash
Blue Fingers
Image by fs999
Pentax K-5 • 200 ISO • Pentax DA* 50-135mm F2.8 SDM
Hoya Pro1 Digital Filter Close-Up N°3
Pink Center
Image by fs999
Pentax K-7 • Pentax DA* 200mm f:2.8 ED SDM
Hoya Pro1 Digital Filter Close-Up N°3
Dörr Combi TTL Macro Flash