The virtues of being up close and using a fast shutter speed with a Nikon [presumably with a large bore prime lens]
see http://www.telegraph.co.uk/earth/earthpicturegalleries/8269306/Birds-in-mid-flight-photographed-by-Roy-Hancliff.html ===============================
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Hi Laurie
Expensive from the point of view that Roy is using 5 standard flash guns (around $500.00 each), but most camera manufacturer’s speed-lites are capable of such speeds as this is how the flash regulates output. Greater power (for longer distances) results in longer flash durations and less power (for close up work) results in shorter flash durations.
Larger species such as the Osprey featured would require longer shooting and flashgun distances, which is convenient, since their movements are slower, and birds such as Hummingbirds, featured below, require faster flash durations, but are more predictable as to position, due to attraction to a feeder. this allows close in flashguns operating at peak flash durations, because they are so close. A cheap way out is to buy small cheaper flashguns and bank them together to get the lighting output you require, while retaining high flash durations. Some very notable Australian photographers have opted for this set up in the past.
You can get away with less flash guns, but run the risk of dark shadows in some parts of the image.
The type of set up Roy is using is shown in a similar set up utilised by Arthur Morris in, the following url
http://www.birdsasart.com/bn246.htm
and there are more results here
http://www.birdsasart.com/bnapril9%202009.htm
Happy birding
Allan Richardson
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Getting flash synchronisation at 1/20,000 sec is impressive [and undoubtedly expensive].
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More pictures here:
http://www.dailymail.co.uk/news/article-1348572/Birds-captured-1-8000th-second-amateur-British-wildlife-photographer.html