Today, once again, I have been taking pictures with the ultra-wide-angle lens. This time I decided to put the so called “zoom in effect” (what a funny word, actually) suitability of the Sigma UWW to the test.
The zoom in effect works like this: (clearly) exposure has to be sufficiently long, so that there is enough time to turn the zoom ring. I usually spend ¾ of time exposing like I would with any other type of picture, during the last ¼ of exposure, I smoothly and consistently turn the zoom ring; you can do it in both directions. In case of Sigma 10-20 f3.5 you can either begin with the focal length of 20mm and then zoom out, or you can begin with the 10mm setting and then zoom in.
Here you can see a sample taken with the initial focal length of 10mm and the zoom in. The total exposure time was 4 seconds and I turned the zoom ring in the very last second:This sample was taken with the initial focal length of 20mm. The total exposure time in this case was 8 seconds and the zoom out was carried out during the remaining 2 seconds:Further examples:
And here some samples of the long exposure photography:
I hope you like the pictures.