Sunday 25 March 2012

Shutter speeds - cameras with a manual option

The exercise required the camera to be fixed in front of something that moves across my view, and kindly suggest water flowing over rocks of which there are plenty in Cumbria!  I set the camera up on a tripod and ran a few trial shots.  Because the focus point was in shade, it was hard to get the right exposure even though I was adjusting aperture.   Eventually I repeated the exercise adjusting ISO as well as aperture and got some pleasing results.  These really show the effect of using different shutter speeds.  In the faster speeds, the water is captured sharply in the focal areas, whilts in the slower speeds, the water looks like it is almost made of milk. 

DSC2766: 1/640s; f5; ISO 500
DSC2767: 1/100s; f/10; ISO 250
DSC2768: 1/50s; f/14; ISO 250
DSC2770: 1/10s; f/29; ISO 200
DSC2771: 1/5s; f/29; ISO 1EV under 200

DSC2766

DSC2767

DSC2768

DSC2770

DSC2771

The exercise also showed the difficulty in using a fast shutter speed and hence large aperture, part of the image is blurred and I hadn't actually focussed where I had intended (I was using manual focus here).  I could have resolved this by using a higher ISO and a smaller aperture, and therefore not got the division between blurred and sharpness.  You can however see the water droplets captured.

I then decided to try to shoot my dogs playing in the water and see if I could freeze some water action.  This was a challenge!  The lighting conditions kept changing as the dogs moved in and out of the shade; the light also changed as I zoomed in and out, and trying to get good composition with the dog and the stone splash in the right place.....well..that was impossible!  But I did get some water action :-)

1/80s

1/250s

1/60s



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