Top critical review
15 people found this helpful
only x3 magnification
on 18 January 2015
Beware; real magnification of this lens is smaller, only x3 compared to advertised x6.
You can check magnification yourself by following two easy steps:
i) on sunny day find, with a piece of paper, where the lens will focus the sunlight, then measure the distance from the lens to the paper. This distance is the focal length. Optical power of the lens (in dioptres) is then 1/f, where f is expressed in metres.
ii) magnification = 0.25m x (optical power) + 1. ( http://en.wikipedia.org/wiki/Magnifying_glass )
I found focal length of the lens to be 13cm (or 0.13m). This gives magnifications of approximately x3