by 61_OTU » Sat Aug 04, 2007 6:28 pm
These were taken with comparatively slow shutter speeds, 1/150th and 1/210th respectively. Combined with the zoom level (I would guess that 196mm was maximum zoom) then this is going to cause a real problem in terms of camera shake. You are already on f3.5, which will probably be thelargest aperture available on your camera at that zoom level, so optically the camera will be allowing in as much light as it can. I think that your issue here is the shutter speed and the magnification of camera shake caused by the use of maximum zoom.
A way of dealing with this may be to increase the ISO setting, which changes the sensitivity of the digital sensor. This would enable you to go for a higher shutter speed as the sensor would capture more light in less time, freezing the action and reducing the shake effect of the lens at maximum zoom.
To add another lens which increases the zoom would probably only magnify the effect you are already seeing.
Of course, increasing the ISO settings introduces more digital 'noise' into the image, which can also cause the image quality to deteriorate.
I'm not claiming to know it all, but these would be the things that I would consider.
Also, not sure where these were taken, but some distortion may be caused by heat haze.
Are these images cropped at all?
Steve
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