Zoom with different scales/ranges

[RubenZx]

Is there any way to zoom.in() and zoom.out() at different levels of zoom, instead of have zoom (zoom.in) or not have zoom (zoom.out)? The problem is that I want different levels of zoom, like 100%-150%-200%-250%-300% (100% = minRatio, 300% = maxRatio), when I'm zooming, and not to get the maxRatio zooming when I zoom.in(), I would like to be able to go by steps.

I've found this solution: Zoom in on a mousewheel point (using scale and translate) using js + css, but I think that this feature should be included in the library, instead of doing it by hand.

[3zzy]

Yes please, really need this!

[valyaevadaria]

I need this too!