I have a magic zoom plus on my site on product detail page, I need to decrease the size of lens irrespective of image size.
I know lens become bigger and smaller based on zoomed image size but is there any way I can control this?
The Magic Zoom Plus hover area is calculated automatically based upon:
You can adjust those settings on the Magic Zoom Plus settings page inside your Magento admin.
In general, the larger your original image, the larger the zoom.
Refer to the documentation for examples.
To change the dimensions of the zoom box, apply the options zoomWidth and/or zoomHeight. For example:
<a href="large.jpg" class="MagicZoom" data-options="zoomWidth:400px; zoomHeight:400px"><img src="small.jpg"></a>