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Originally Posted by CT
I don't see that the 1.6X factor has any effect on shutter speed...does it?
The focal length of the lens is still actually exactly the same. A 500mm lens on a 1.6X sensor is till the same focal length as on a 1:1 sensor (or 35mm film). Contrary to popular belief there is no magnification involved - the 1.6X isn't a magnification - it's a crop.
The often quoted 'gain' with tele lenses is just down to the fact that exactly the same size image hits the sensor as it would with film, but on a much smaller area, therefore giving the equivalent (much tighter) field of view as a lens 1.6X longer on a 1:1 sensor or 35mm film.
I know it makes your head hurt thinking about this stuff.  |
I may be wrong here but..........(thinks how to explain)
if you use a 300mm lens with a ccd crop factor of 1.5 that gives you an effective focal length of 450mm. it won't introduce anymore camera shake physically as the lens is still the same length. However, the shake will be more noticeable as the field of view will be smaller. a movement of 1 degree is a higher percentage of the total field of view as the magnification gets higher.
*bleeds from ears*