This mod adds a custom zoom button, it works with 1.15, but it will work fine in 1.15.1 if Cloth Config 2 of this version is installed, if you do not have the mod menu installed.
Ok Zoomer Mod for Minecraft 1.15.1/1.15
By default it works like OptiFine zoom, but there are some additional functions that can be switched, for example:
Smooth camera
Classical smoothness when viewing, but unlike other zoom modes of Mods, it works very well together with the Cinema mode of Minecraft, the only change in it is that clicking on it will no longer switch the Kinematic mode several times, but with normal use it must have values, it is enabled by default.
Smooth transition
When zooming in and out, there will be a transition between the two states when this function is on. Although it works fine with the default configuration, it is prone to breakdowns when working with modified scaling factors; by default it is disabled.
Zoom switch
This is similar to improved sprinting, but for scaling, when turned on, it allows you to switch the scale instead of holding it, quite simply, by default it is turned off to provide OptiFine scaling.
Download Link: okzoomer-1.0.1