by 61_OTU » Sat Jan 13, 2007 5:56 pm 
			
			Hi Craig,
the larger the aperture, the more light you'll get in through the lens onto the sensor. When you open the aperture wide the f number decreases. My Fuji Finepix goes from f8 (small aperture, so not much light through) to f3.2 (wide open aperture, maximum light to the sensor).
This means with a large aperture (f3.2 on mine) you get most light, and therefore can go for a faster shutter speed, which will reduce camera shake.
A problem with a large aperture, is that is reduces the depth of field. This means that if you focus on the nose of an F1 car from the front, with a large f3.2 aperture, then the car may be out of focus from half way back.
The reason you got blurry shots last year is that the aperture you selected (or the camera selected), would have been in the middle of your range to get a good proportion of the image in focus. This would have restricted the available light through the lens, and lowered the shutter speed. The lower shutter speed means that any camer shake would have been very visible. in the resulting image. 
The good thing about cars in a show, is that they don't move. If you can get a tripod (even a video camer tripod is better than nothing if you have one), then you can lock the camera in place and get a nice crisp shot of the car. You may still find that people get blurred, as their movement will show up in the slow shutter speed, but this could look artistic if you play around with it.
I find that on-board flash just looks too obvious and just doesn't travel far enough when taking the sort of shots you're talking about.
Steve
			
				Last edited by 
61_OTU on Sat Jan 13, 2007 5:57 pm, edited 1 time in total.
					
				
 
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