Exercise 4 revisited .. with a little help from Nelson
Although my initial efforts
addressed the brief of producing a set of photographs that demonstrated the
influence of shutter speed on movement of the subject, I felt that a more
photogenic setting would have helped the cause.
A trip up to London, initially to research some images for the ‘Contrasts‘
assignment and also to go to the World Wildlife Photographer of the Year
exhibition at the Natural History Museum and the Taylor Wessing Portrait Prize
exhibition at the National Portrait Gallery, gave me the chance to look at
water movement again, this time using the fountains in Trafalgar Square. I wanted to get the movement going across the
frame, so although I did shoot several sequences of the famous fountains, I
spent most time with the squirting dolphins (at least, I think they are
dolphins!). These gave a consistent and rapid
water flow and also gave me the chance to get close with the minimum of
disruption from tourists. I’ll write
more about the two exhibitions and what I learnt there in a later blog after I
have assimilated my thoughts on an awful lot of very different pictures.
I shot 12 images from
1/6000sec down to 0.3sec. I also
observed the influence of shutter speed on aperture: the table below shows the
relationship as the camera sought to maintain ‘correct’ exposure.
1/6000sec f/4 1/3000sec f/4 1/1500sec f/4
1/750sec f/4 1/350sec f/5.6 1/180sec f/8
1/90sec f/11 1/45sec f/16 1/20sec f/22
1/10sec f/22 1/6sec f/22 0.3sec f/22
This was a far more powerful
water flow than in the weir pool exercise and 1/1500sec was the slowest shutter
speed at which I would say that the water was frozen in motion. AT 1/180sec the water plume had lost all
definition and this gradually declined further as the shutter speed
decreased. At 1/20 sec individual
droplets of water were streaked right across the frame. The images I took are shown below.
5D Mk II with 24-105mm f/4 L IS lens
Post a Comment