Question

 If the distance from a converging lens to the object is less than the focal length of the lens what willl the image appear to be?

Answer C: virtual, upright, and larger than the object
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How does the ccd affect focal length in lens of the camera?

How can I find the Focal Length or F-number of a lens?

The f-number is a ratio, just multiply the effective aperture by the f-number to get the focal length.It works this way because it gives repeatable results - no matter what the effective diameter, ... Read More »
http://answers.yahoo.com/question/index?qid=20130410103908AAXzDDB

Digital Lens Focal Length Differences?

When digital single-lens reflex cameras, both 35 mm-style and medium format, came along, all the old lenses for film cameras could still be used. In other words, if a person had a slew of lenses ma... Read More »
http://www.ehow.com/list_6809388_digital-lens-focal-length-differences.html

How to find out the focal length of a telescope for lens?

For most purchased telescopes, the focal length of the objective lens will be printed on the lens' mounting ring, and it will definitely be stated somewhere on the packing box and in the literatu... Read More »
http://wiki.answers.com/Q/How_to_find_out_the_focal_length_of_a_telescope_for_lens


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