Showing posts with label bird photography. Show all posts
Showing posts with label bird photography. Show all posts

2 Sept 2008

Wildlife photography - spoonbills

I was out on the River Dee near my home the other day with wildlife ranger and photographer Keith Kirk. Some of my students will know Keith because I sometimes arrange for them to spend the day shooting wildlife with him.

The reason for our river trip was something very special – indeed it is a First for Scotland. Here in Kirkcudbright it has been known for some months that a pair of spoonbills have been feeding on the mud banks of the river. Well, it is now confirmed that the birds have successfully raised three chicks nearby. All five birds are now seen regularly feeding in the shallows.

This is an extremely rare and important event for wildlife in Britain. Although there is one instance of spoonbills having bred successfully in England, it is the first time in over 300 years that they have bred as far north as SW Scotland. Twitchers are now flocking to Kirkcudbright to see the spoonbills and, happily, the birds seem quite oblivious to their new fame.

Keith was shooting with his Nikon D300 and a 500mm Sigma lens. Due to the shallow water over the mud banks we were unable to get the boat very close, and Keith’s biggest difficulty was in keeping the camera still with the slow shutter speeds needed in the very low light. Although he pushed the ISO right up to 1600, and opened the aperture as wide as possible, he was still using a shutter speed of just 125sec. The motion of the boat and the movement of the birds did not help.

But just look at the picture Keith achieved – you can even see the rain spot bouncing off the wet mud.
If you would like to spend a day with Keith photographing wildlife in Galloway, Scotland, just contact me and I'll see if it can be arranged.

Top photograph by Keith Kirk
…and here’s one of the adult spoonbills striding past a resident heron. Under the conditions, that’s a great shot, Keith.

Lower photograph shows Keith at work photographing the spoonbills from the boat
Find out more about these rare birds on the RSPB site

12 Mar 2008

Aperture Value

Carl posted a comment yesterday about Ken Terry's beautiful wildlife pictures.

Ken said that he used ISO 1000 and an aperture of f5.0 in AV mode as the light was changing so quickly. Sometimes the shutter speed was 1/500 and sometimes 1/4000.

Carl commented:
...really enjoyed this. But trying to work out what AV is, in relation to rapidly changing light?

'AV' - Aperture Value - is an automatic exposure mode in which you set the aperture you want and the camera decides on the correct shutter speed to match it. This can be very useful in rapidly changing light conditions like those Ken experienced when he was photographing the red kites and the red squirrels. In these conditions it can be difficult, if not impossible, to constantly adjust the exposure manually. In other words, you just cannot keep up with the fast changing light levels by correcting the exposure yourself in the Manual ('M') mode. When shooting a fast-moving subject like a bird in flight, operating the camera quickly is vitally important, so setting the exposure mode to an automatic setting can be a boon and one less thing to bother about.

So in Ken's case, he set f5.0 in 'AV' mode. When the sun went behind cloud and the light level dropped, the camera chose a shutter speed 1/500sec. When the sun came out and light level went up, the camera chose a shutter speed of 1/4000sec.

Some time ago I posted a photograph of Freddie Mercury. Click the link below. I used 'AV' exposure mode for this because the stage lights in the studio where the photograph was taken were constantly going on and off, with light levels going up and down. It would have been impossible to keep up with the exposure manually in 'M' mode, so I set something like f2.8 in 'AV' mode and let the camera sort out the shutter speed.

Just one tip here... Aperture Value (AV) used to me known as Aperture Priority (AP), far more sensible and descriptive. Until some fool decided to change it.
http://philipdunn.blogspot.com/search?q=mercury