This first photo is a Phalaenopsis orchid, taken with my Canon Digital Rebel XT and a Sigma 70mm macro lens. The exposure was 3 seconds at F11 & ISO 100, shot in RAW, processed in Adobe Lightroom and saved as a TIFF file. Before I converted it to JPEG I ran it through Photoshop 7 to adjust the contrast a bit. The lighting was late afternoon natural light coming in from the right, with a black cloth background and a white reflector about 6 inches to the left of the flower to fill in the shadows a bit. This small image does not do justice to the subtle detail throughout all of this shot, and even at much higher magnification it holds it's image quality quite well.
The next three photos are of Chiritas. These are a very attractive tropical plant in the family of African Violets standing about 5 inches tall. These were also taken with natural light using the Rebel XT. The lens was a Canon 18 - 55.