Robert P. Munafo, 1999 Jan 29.
The "magnification" of a view is inversely proportional to the width or height of the image, expressed as a real number giving a distance on the complex plane, not an integer giving the number of pixels.
The highest magnification you can use for a view depends on the pixel size of the view and the number of digits of accuracy used in the computations.
From the Mandelbrot Set Glossary and Encyclopedia, by Robert Munafo, (c) 1987-2012. Mu-ency index