The closer the object is to the lens, the closer the virtual image is to the lens.
From the en.wikipedia.org
Working distance is the distance between the back of the lens and the target object.
From the en.wikipedia.org
The gravity from the mass of the intervening object, or lens star, warps surrounding space and acts like a giant magnifying glass.
From the sciencedaily.com
The way in which a gravitational lens bends the light rays of its background star indicates what type of object causes the lens.
From the sciencedaily.com
In this case, the data collected by the PLANET team confirmed that the lens object was a binary star system.
From the sciencedaily.com
There the image forms from photons that come out of the flash, bounce off an object and into the lens.
From the newscientist.com
The object of measurement is usually located in the front focal plane of the lens.
From the en.wikipedia.org
Chameleons do it by changing the focus of the eye's lens, bringing the object in and out of focus.
From the newscientist.com
Their set-up still has a lens above the object, but instead of splitting the laser beam and directing half of it through a lens below the object, they simply place a mirror there.