CS178 Assignment 3 - Macro
Apr 23, 2012Public
Photo: Requirements 2, 3, & 5 (midground focus, bugs, & man-made objects): I managed to capture two ladybugs in a faceoff on the asphalt sidewalk. It seems whimsical and almost fake as they pause, looking at each other. The photo is focused on the midground with blurry elements in front of and behind the ladybugs. The asphalt provides a nice contrast in color and texture. 1/320, f/5.6. Post-processing: none.
Photo: Requirements 2 & 5 (midground focus & man-made object): This photo is of a fused glass plate made from recycled glass chunks. The midground focus clearly shows some of the textures of the plate while leaving other aspects blurry. Post-processing: cropped.
Photo: Requirements 1 & 4 (foreground & plants): I like the juxtaposition between the flower of the cactus plant and the faraway, blurry palm tree -- both of which are similarly shaped.  Focus is on the foreground with out-of-focus elements behind it. Taken in Stanford's cactus garden. 1/800, f/7.1. No post-production.
Photo: Requirements 2 & 4 (midground focus & plant): The dried-up flowers of the cactus fell and collected into its channels. I like the lines and textures of the photo, whose focus is midground with blurry elements in front of and behind the pile of flowers. 1/500, f/5.6. Post-processing: none.
Photo: Requirements 2 & 3 (midground & bugs): I caught the ladybug mid-wingflap as it perched on the edge of a leaf. Its legs carefully clasp the ledge. The photo is focused on midground, though there are few elements in front of the subject that are out of focus. 1/100, f/5.6.  Post-production: slightly cropped.
Photo: Requirements 2 & 4 (midground focus & plants): I particularly like the shadow of the pollen-covered pistils seen from almost-glowing, backlit flower petals. The midground focus on the flower leaves blurry elements in front and behind the subject. Could've been better if I hadn't cut off the left edge of the flower. No post-processing.
Photo: Requirements 2 & 4 (midground focus & plants): I like the incredible textures of this one tree branch, located in a shady area of the cactus garden. The bright daylight illuminates the chartreuse-green color, and the midground focus leaves the blurry elements really far away and really close up. No post-processing.
Photo: Requirements 2 & 3 (midground focus & bugs): This bright green caterpillar (?) was carefully making its way across a gravel path. Focus is on midground with blurry elements in front of and behind the bug and leaf. Post-processing: cropped.
Photo: Setup: I placed the camera approximately 2 ft from the wall (door). The 18" ruler is propped up against the wall at an exact 45-degree angle (with 18in as the length of hypotenuse, I backwards calculated (via Pythagorean theorem) the lengths of the triangle sides to be 12.7in). The camera lens sits 31 cm from the end of the ruler, so U = 310mm.
Photo: The lens is 55mm, and aperture is at f/5. Camera lens is sitting 310mm from the end of the ruler, so N = 5.6, f = 55, and U = 310. My Nikon D50 sensor size (according to dpreview.com) is 23.7 x 15.5mm, so assuming a circle of confusion of (1.5/1000)*23.7, C = 0.035mm.  Plugging into the DoF equation, (5.6 * 310^2 * 0.035)/(55^2) = 6.23mm. At an angle of 45 degrees, DoF = square-root of 2 * 6.23mm = 8.81mm. The photo looks to be in focus between 0mm and 7mm, so it's close!
Photo: I scaled the aperture from 5.6 to 11 (not quite by a factor of 2 exactly). That's actually a factor of 1.96, so if I multiply my DoF by 1.96, I get 17.1mm. The photo doesn't seem to be in focus all the way up to 17mm (which is past the picture unfortunately), but it's DoF has certainly increased compared to the last one. In this photo, the slow shutter speed might've contributed a slight bit of blurriness.