Still in Illinois and still enjoying the remarkable string of great Fall weather! Seems we've been enjoying blue skies and few rains - virtually ALL of the crops have been harvested, as seen on my trip to Iowa yesterday. In decades past we've gone well into December, so harvest completion by mid-November is a good thing for the farmers. We just had our first freeze the other night, a full month later than the median date of 11 October (median date indicates half of first freeze is before, half after, for average of last 30 years).
With the success of my "dewdrop" pictures out in the yard a week or two ago, when I woke to find the white frosting on the lawn, I ran for the camera and tripod and went to work. The setup is the same from the dew shots, 100mm macro, full-frame Canon 6D and about 3cm of extension tube for more magnification. Now I've shot and posted some frost pictures before with great results from a few years back. But I suspect my techniques have improved some over the years, so was looking forward to shooting more. After the spectacular shots of the dandelion seed heads in the dewdrop post, I was on the lookout for more dandelions, but you know, if there were any, they were well-disguised among the frost crystals! I swore that the image at right was a dandelion until I started looking it on the computer - it might be a seed head, but is not a dandelion - still some interesting crystals on it...
I still use the focus-stacking technique to combine several images to keep the full range of the image in focus. I've found that for full-resolution viewing though, only the range of focus of the area of interest needs to be stacked. So some of these are only a few combined frames. At left is a leaf where all 19 exposed frames were taken, which takes a lot of processing time to stack them all. At right is a close-up with only 8 frames which takes less time with no decrease in sharpness.
I know little about frost formation. The little reading I've done shows there are multiple kinds of frost depending on humidity and temperature of air and surfaces. But there are some really interesting-looking crystals that almost look like hollow tubes in these pictures. Will have to keep at it, and try to get closer still! As it was, kneeling in the wet cold grass was still worth the results, I think!