Here is our entry in Tourmaline’s One Word Photo Challenge: Macro.
This is an image of a small portion of a red raspberry that was about 1/2 inch in diameter.
This photo was taken on November 23, 2017. Specs are:
Canon 100D, ISO 100, f/22, 30 sec, 60mm
This is another entry in The Daily Post Photo Challenge: Experimental.
We have been experimenting with macro photography of readily-available fruit. One technique we wanted to try was using cross-polarized light. Generally, light scatters in all directions. A polarizer filters light so that only streams of light in parallel planes pass. Theses filters are used in photography to eliminate reflective glare and improve contrast.
Two polarizing filters can be arranged in sequence with light passing through the first filter and the camera lens behind the second. These filters can be rotated to block all (really almost all) light. If a translucent object is placed between the filters, it can scatter some of the incoming light. Different regions in the object can scatter the light to different degrees. Some of the scattered light is aligned with the second filter and is visible to the camera. Whew!
We placed a thin lime slice (a.k.a a translucent object) between the first filter illuminated by a light table and the second filter attached to the lens of a tripod-mounted camera. The first filter was mounted in a hole cut in black poster board to prevent other, non-polarized light from leaking through and reaching the camera. The filter on the lens was then rotated to maximize the contrast in the image. The following image shows the result.
A lime in cross-polarized light
The dark regions show where the light passed through the lime without having its polarization changed by scattering. The bright regions show where the polarized light was scattered as it passed through the lime and much of this scattered light aligned with the second filter mounted on the lens. This was a fun way to pass a chilly grey day at home.
This photo was taken on November 19, 2017. Specs are:
Canon 100D, ISO 100, f/8, 0.4 sec, 100 mm
This is our entry in The Daily Post Photo Challenge: Experimental.
The following macro photograph shows the results of an experiment in which a red raspberry was illuminated from the inside. A sheet of black paper with a small hole was placed on a light table to provide the light source and the berry was centered on the hole. The berry was only about 1/2″ across but the image looks like an exploding star to us.
This photo was taken on November 17, 2017. Specs are:
Canon 100D, ISO 100, f/16, 30 sec, 100 mm
This is our entry in The Girl That Dreams Awake’s 52 WEEKS PHOTO CHALLENGE: WEEK 32 – SHALLOW DEPTH OF FIELD.
This photo of a lily focuses on the stigma of the pistil and the closest anthers of the filaments. The rest of the pistil, stamens, and petals are outside the depth of field.
Shallow Depth of Field
This photo was taken on October 23, 2016. For the lens used, this was the widest aperture and longest focal length at minimum focusing distance. Specs are:
Canon 100D, ISO 100, f/5.6, 1/25 sec, 55 mm