I would like to create a magnifying glass that just scales up the part of the image that the mask covers.
I tried for a couple days, scratching my head, to find a way to create a magnifying glass.
I found an old post that suggested to use the Lens FX which was a good step but it created my problem that I don't know how to resolve.
I understand that the Lens FX magnification scales the image (for example 300%) but my problem is it creates an offset.
Is there a way to have a magnifying glass at a fix position with the zoom about what is show with the mouse?
Also mentioned by dahu and kinetic ?
The link below shows really well the expected result:
Thank you everyone for your useful help.