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If she's heading into a career I'm betting its something along the lines of portraits/studio work (not certain as there are many other areas of course) but if that's her line then she'll fast be wanting to put money into lighting gear. One bonus of going to college though is that many will have their own camera gear and studio setups so she should be able to rent some of the gear from them that she needs - she might also get discounts and such through the college at local/chain shops.
As for crop factor, the image itself will appear in the viewfinder (that is part of what the SLR part of the name means). However if you take a single lens, for arguments sake lets say a 50mm lens, and put it onto a 35mm and then a 1.6 crop camera and, without moving your position (ie distance from subject to camera remains the same) then the shot taken with the 1.6 crop camera will (and this will be visible through the viewfinder as well as on the final photo) appear differently. In comparison it will appear more like a photo taken with an 80mm on the 35mm camera instead of a 50mm (80 being 1.6 times longer than 50).
This is because the crop sensor is smaller than the 35mm and as such captures a smaller part of the image circle made by the lens, the outer areas are simply not seen by the camera at all. As a result the photo appears more "zoomed" in. Note that the photo itself, will still be the same size (pixels are still pixels) when comparing cameras of the same MP rating.
Note also that, correctly speaking, the focal length hasn't actually changed at all, its the angle of view that has changed as a result of the difference in the size of the recording (sensor/film) area - however in common talk most understand it best by thinking that the crop sensors give a longer focal length view.
As for crop factor, the image itself will appear in the viewfinder (that is part of what the SLR part of the name means). However if you take a single lens, for arguments sake lets say a 50mm lens, and put it onto a 35mm and then a 1.6 crop camera and, without moving your position (ie distance from subject to camera remains the same) then the shot taken with the 1.6 crop camera will (and this will be visible through the viewfinder as well as on the final photo) appear differently. In comparison it will appear more like a photo taken with an 80mm on the 35mm camera instead of a 50mm (80 being 1.6 times longer than 50).
This is because the crop sensor is smaller than the 35mm and as such captures a smaller part of the image circle made by the lens, the outer areas are simply not seen by the camera at all. As a result the photo appears more "zoomed" in. Note that the photo itself, will still be the same size (pixels are still pixels) when comparing cameras of the same MP rating.
Note also that, correctly speaking, the focal length hasn't actually changed at all, its the angle of view that has changed as a result of the difference in the size of the recording (sensor/film) area - however in common talk most understand it best by thinking that the crop sensors give a longer focal length view.