Today we explored use of the macro lense with glass and colored liquids. Using a tripod with remote trigger, setting the camera to  "live view" helped in focusing the photo.  However, Bill found it necessary to switch off "live view"  [while preserving the focus], then shoot in manual mode with a very high f-stop (f 25) and long exposures of 25 to 30 seconds. This achieved the best results.  We had not done this before.  In post-processing the photos, it was fun to find "paintings" in the photographs.  Some of the interesting textures are due to the flaws in the glass. Below are examples.  CC