I am trying to find a websites that shows the comparison between different zoom lens sizes (eg 35mm, 50mm, 200mm and 5 times, 10times etc) by showing an image taken by different lens sizes.
Heres a tool from Tamron which allows you to start with an image shown at 11mm focal length and zoom it up to 500mm focal length
http://www.tamron.com/lenses/learning_center/tools/focal-length-comparison.php
Forget the 5x 10x stuff. Its useless. 10-50mm is 5x but so is 50-250mm. You need to know actual focal length for film or full sensor or equivalent focal lengths for smaller sensors. Not the multiplication factor.
i think this will give you what you are after:
http://en.wikipedia.org/wiki/Zoom_lens
Joe
References :
Heres a tool from Tamron which allows you to start with an image shown at 11mm focal length and zoom it up to 500mm focal length
http://www.tamron.com/lenses/learning_center/tools/focal-length-comparison.php
Forget the 5x 10x stuff. Its useless. 10-50mm is 5x but so is 50-250mm. You need to know actual focal length for film or full sensor or equivalent focal lengths for smaller sensors. Not the multiplication factor.
References :