What is the max magnification of 0.5mm film lens.

AI Thread Summary
The maximum magnification of a 0.5mm film lens is not definitive and depends on the lens's radius of curvature. A Fresnel lens placed on top of the film can enhance magnification of flat objects like paper or displays. The discussion references a link that explains how spherical lenses can be substituted with stepped lenses for magnification purposes. Additionally, it mentions a formula for calculating magnification related to Fresnel page magnifiers. Understanding these factors is crucial for determining effective magnification.
MJ Lee
What is the max magnification of 0.5mm film lens.

Film is just on the top of flat object(Paper, Display, Picture, etc).
If Fresnel lens is made on top of the film, Can I magnify the object?

Thank you.
 
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The way a 'film' lens depends on the radius of curvature of the lens from which it was developed so you cannot have a definitive answer to your question. See this link. which shows how a spherical lens can be substituted with a stepped (thin) lens.
There is a reference to fresnel page magnifiers in this link. and the magnification formula is there.
 
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